info@stjohnslabs.com

+44 (0)208 223 3081

USD

Search

Compare
Login / Register
View Cart

Search

All
Primary antibodies
Secondary antibodies
Nanobodies
Kits
- Antibody Pairs
Proteins
Trial Size Antibodies
Blog
Company
- St John's Laboratory Guarantee
- Contact Us

USD
Compare
Login Register

Home
All
Kits
ELISA Kits
Competitive ELISA Kits

All

Refine by

No filters applied

Browse by Size, Reactivity & more Hide Filters Show Filters

Enter the minimum price to filter products by

Enter the maximum price to filter products by

Competitive ELISA Kits

This type of assay is used to measure the antigen concentration via signal interference detection.

Show

Show

Sort By:

15d-PGJ2 (15-Deoxy-Delta12, 14-prostaglandin J2) Competitive ELISA Kit (STJE0006615)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
3-NT (3-Nitrotyrosine) Competitive ELISA Kit (STJE0006588)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
4-HNE (4-Hydroxynonenal) Competitive ELISA Kit (STJE0006631)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
5-HIAA (5-Hydroxyindoleacetic Acid) Competitive ELISA Kit (STJE0006609)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
6-keto-PGF1a (6-keto-prostaglandin F1a) Competitive ELISA Kit (STJE0006597)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
8-epi-PGF2 Alpha (8-Epi-Prostaglandin F2 Alpha) Competitive ELISA Kit (STJE0006589)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
8-OHdG (8-Hydroxydeoxyguanosine) Competitive ELISA Kit (STJE0006582)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
A-CoA (Acetyl Coenzyme A) Competitive ELISA Kit (STJE0006630)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
AA (Arachidonic Acid) Competitive ELISA Kit (STJE0006594)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ACH (Acetylcholine) Competitive ELISA Kit (STJE0006611)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ADMA (Asymmetrical Dimethylarginine) Competitive ELISA Kit (STJE0006590)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ALD (Aldosterone) Competitive ELISA Kit (STJE0006606)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bb (Bilirubin) Competitive ELISA Kit (STJE0006610)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Biotin Biotin (Biotin) Competitive ELISA Kit (STJE0020092)

Applications :

ELISA

Reactivity :

Biotin

MSRP:

Was:

Now: $225.63 - $418.83

Choose Options
Bovine AngII (Angiotensin II) Competitive ELISA Kit (STJE0007125)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $610.65 - $834.21

Choose Options
Bovine AngII (Angiotensin II) Ready-To-Use Competitive ELISA Kit (STJE0013501)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $635.49 - $872.85

Choose Options
Bovine AP (Aprotinin) Competitive ELISA Kit (STJE0007193)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine AP (Aprotinin) Ready-To-Use Competitive ELISA Kit (STJE0013569)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine bEP (Beta-Endorphin) Competitive ELISA Kit (STJE0007466)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine bEP (Beta-Endorphin) Ready-To-Use Competitive ELISA Kit (STJE0013842)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine Cortisol (Cortisol) Competitive ELISA Kit (STJE0006716)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine CTSD (Cathepsin D) Competitive ELISA Kit (STJE0008233)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine CTSD (Cathepsin D) Ready-To-Use Competitive ELISA Kit (STJE0014609)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $743.13 - $1,023.27

Choose Options
Bovine E2 (Estradiol) Competitive ELISA Kit (STJE0006715)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine E3 (Estriol) Competitive ELISA Kit (STJE0006737)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine GHRH (Growth Hormone Releasing Hormone) Competitive ELISA Kit (STJE0009156)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine GHRH (Growth Hormone Releasing Hormone) Ready-To-Use Competitive ELISA Kit (STJE0015536)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine LH (Luteinizing Hormone) Competitive ELISA Kit (STJE0010332)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine LH (Luteinizing Hormone) Ready-To-Use Competitive ELISA Kit (STJE0016719)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine NPY (Neuropeptide Y) Competitive ELISA Kit (STJE0011053)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine NPY (Neuropeptide Y) Ready-To-Use Competitive ELISA Kit (STJE0017440)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine OXA (Orexin A) Competitive ELISA Kit (STJE0011226)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine OXA (Orexin A) Ready-To-Use Competitive ELISA Kit (STJE0017613)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $743.13 - $1,023.27

Choose Options
Bovine Pg (Progesterone) Competitive ELISA Kit (STJE0006738)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine PTH (Parathyroid Hormone) Competitive ELISA Kit (STJE0011740)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine PTH (Parathyroid Hormone) Ready-To-Use Competitive ELISA Kit (STJE0018126)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine TG (Thyroglobulin) Competitive ELISA Kit (STJE0019713)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $531.99

Choose Options
Bovine TTR (Transthyretin) Competitive ELISA Kit (STJE0012856)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine TTR (Transthyretin) Ready-To-Use Competitive ELISA Kit (STJE0019244)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine VIP (Vasoactive Intestinal Peptide) Competitive ELISA Kit (STJE0013041)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine VIP (Vasoactive Intestinal Peptide) Ready-To-Use Competitive ELISA Kit (STJE0019431)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine/Sheep Cortisol (Cortisol) Competitive ELISA Kit (STJE0001909)

Applications :

ELISA

Reactivity :

Bovine/Sheep

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
cAMP (Cyclic adenosine monophosphate) Competitive ELISA Kit (STJE0006598)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Canine ACTH (Adrenocorticotropic Hormone) Competitive ELISA Kit (STJE0006870)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $657.57 - $899.07

Choose Options
Canine ACTH (Adrenocorticotropic Hormone) Ready-To-Use Competitive ELISA Kit (STJE0013246)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $685.17 - $940.47

Choose Options
Canine ADM (Adrenomedullin) Competitive ELISA Kit (STJE0006933)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $657.57 - $899.07

Choose Options
Canine ADM (Adrenomedullin) Ready-To-Use Competitive ELISA Kit (STJE0013309)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $685.17 - $940.47

Choose Options
Canine ALB (Albumin) Competitive ELISA Kit (STJE0007041)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $424.35 - $567.87

Choose Options

15d-PGJ2 (15-Deoxy-Delta12, 14-prostaglandin J2) Competitive ELISA Kit (STJE0006615)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
3-NT (3-Nitrotyrosine) Competitive ELISA Kit (STJE0006588)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
4-HNE (4-Hydroxynonenal) Competitive ELISA Kit (STJE0006631)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
5-HIAA (5-Hydroxyindoleacetic Acid) Competitive ELISA Kit (STJE0006609)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
6-keto-PGF1a (6-keto-prostaglandin F1a) Competitive ELISA Kit (STJE0006597)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
8-epi-PGF2 Alpha (8-Epi-Prostaglandin F2 Alpha) Competitive ELISA Kit (STJE0006589)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
8-OHdG (8-Hydroxydeoxyguanosine) Competitive ELISA Kit (STJE0006582)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
A-CoA (Acetyl Coenzyme A) Competitive ELISA Kit (STJE0006630)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
AA (Arachidonic Acid) Competitive ELISA Kit (STJE0006594)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ACH (Acetylcholine) Competitive ELISA Kit (STJE0006611)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ADMA (Asymmetrical Dimethylarginine) Competitive ELISA Kit (STJE0006590)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
ALD (Aldosterone) Competitive ELISA Kit (STJE0006606)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bb (Bilirubin) Competitive ELISA Kit (STJE0006610)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Biotin Biotin (Biotin) Competitive ELISA Kit (STJE0020092)

Applications :

ELISA

Reactivity :

Biotin

MSRP:

Was:

Now: $225.63 - $418.83

Choose Options
Bovine AngII (Angiotensin II) Competitive ELISA Kit (STJE0007125)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $610.65 - $834.21

Choose Options
Bovine AngII (Angiotensin II) Ready-To-Use Competitive ELISA Kit (STJE0013501)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $635.49 - $872.85

Choose Options
Bovine AP (Aprotinin) Competitive ELISA Kit (STJE0007193)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine AP (Aprotinin) Ready-To-Use Competitive ELISA Kit (STJE0013569)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine bEP (Beta-Endorphin) Competitive ELISA Kit (STJE0007466)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine bEP (Beta-Endorphin) Ready-To-Use Competitive ELISA Kit (STJE0013842)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine Cortisol (Cortisol) Competitive ELISA Kit (STJE0006716)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine CTSD (Cathepsin D) Competitive ELISA Kit (STJE0008233)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine CTSD (Cathepsin D) Ready-To-Use Competitive ELISA Kit (STJE0014609)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $743.13 - $1,023.27

Choose Options
Bovine E2 (Estradiol) Competitive ELISA Kit (STJE0006715)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine E3 (Estriol) Competitive ELISA Kit (STJE0006737)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine GHRH (Growth Hormone Releasing Hormone) Competitive ELISA Kit (STJE0009156)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine GHRH (Growth Hormone Releasing Hormone) Ready-To-Use Competitive ELISA Kit (STJE0015536)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine LH (Luteinizing Hormone) Competitive ELISA Kit (STJE0010332)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine LH (Luteinizing Hormone) Ready-To-Use Competitive ELISA Kit (STJE0016719)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine NPY (Neuropeptide Y) Competitive ELISA Kit (STJE0011053)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine NPY (Neuropeptide Y) Ready-To-Use Competitive ELISA Kit (STJE0017440)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine OXA (Orexin A) Competitive ELISA Kit (STJE0011226)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine OXA (Orexin A) Ready-To-Use Competitive ELISA Kit (STJE0017613)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $743.13 - $1,023.27

Choose Options
Bovine Pg (Progesterone) Competitive ELISA Kit (STJE0006738)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Bovine PTH (Parathyroid Hormone) Competitive ELISA Kit (STJE0011740)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine PTH (Parathyroid Hormone) Ready-To-Use Competitive ELISA Kit (STJE0018126)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine TG (Thyroglobulin) Competitive ELISA Kit (STJE0019713)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $225.63 - $531.99

Choose Options
Bovine TTR (Transthyretin) Competitive ELISA Kit (STJE0012856)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine TTR (Transthyretin) Ready-To-Use Competitive ELISA Kit (STJE0019244)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine VIP (Vasoactive Intestinal Peptide) Competitive ELISA Kit (STJE0013041)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $682.41 - $936.33

Choose Options
Bovine VIP (Vasoactive Intestinal Peptide) Ready-To-Use Competitive ELISA Kit (STJE0019431)

Applications :

ELISA

Reactivity :

Bovine

MSRP:

Was:

Now: $711.39 - $979.11

Choose Options
Bovine/Sheep Cortisol (Cortisol) Competitive ELISA Kit (STJE0001909)

Applications :

ELISA

Reactivity :

Bovine/Sheep

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
cAMP (Cyclic adenosine monophosphate) Competitive ELISA Kit (STJE0006598)

Applications :

ELISA

Reactivity :

All

MSRP:

Was:

Now: $225.63 - $493.35

Choose Options
Canine ACTH (Adrenocorticotropic Hormone) Competitive ELISA Kit (STJE0006870)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $657.57 - $899.07

Choose Options
Canine ACTH (Adrenocorticotropic Hormone) Ready-To-Use Competitive ELISA Kit (STJE0013246)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $685.17 - $940.47

Choose Options
Canine ADM (Adrenomedullin) Competitive ELISA Kit (STJE0006933)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $657.57 - $899.07

Choose Options
Canine ADM (Adrenomedullin) Ready-To-Use Competitive ELISA Kit (STJE0013309)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $685.17 - $940.47

Choose Options
Canine ALB (Albumin) Competitive ELISA Kit (STJE0007041)

Applications :

ELISA

Reactivity :

Canine

MSRP:

Was:

Now: $424.35 - $567.87

Choose Options

48 of 630 Items

1
2
3
4
5
6

!

Footer Start

Information

about us
distributors
privacy policy
terms & conditions
blog

Customer service

contact us
shipping
FAQ
antibody troubleshooting

My Account

my account
order history

Company

St John's Laboratory Ltd
Knowledge Dock Business Centre
University Way
London
E16 2RD, UK

Subscribe

newsletter.subscribe_intro

Email Address

Receive discounts, product insights and technical resources as a subscriber.

© 2026 Product Ecommerce St John's Laboratory Ltd All Rights Reserved.

Terms
Privacy
Cookies