Radiometric detection is considered the gold standard for many applications, from drug discovery and development to plant sciences. 125I labeled compounds are useful in both basic research and drug discovery where they are used as tracers in radioimmunoassays (RIA) and ligands in binding studies. 125I is particularly versatile as it emits both gamma and Auger electrons. This means that can be it counted either directly, without requiring scintillation, or by using a liquid scintillation counter. We offer a wide range of 125I labeled compounds as well as customized services to label your unique compound.
We also provide customized services to 131I labeled your compound of interest.
Neurokinin B (NKB), labeled with 125I on the histidine residue. Neurokinin B is involved in ovarian cycle regulation, and binds neurokinin 3 receptor (NK3R; tachykinin receptor 3), a GPCR involved in vascular remodeling, angiogenesis, and cancer.
Pituitary adenylate cyclase activating peptide-27 (PACAP-27), labeled with 125I. PACAP-27 binds the pituitary adenylate cyclase-activating polypeptide type I receptor (PAC1) and vasoactive intestinal peptide receptors (VPAC1 and VPAC2).
cAMP, labeled with 125I on the tyrosine methyl ester group. I-125 labeled cAMP can be used as a tracer for radioimmunoassays to detect levels of endogenous cAMP in a sample or for GPCR functional assays.
Glucagon-like peptide-1 (GLP-1), labeled with 125I. GLP-1 is a peptide hormone involved in secretion of insulin, and binds and activates GLP-1 receptors, a member of the glucagon receptor family of GPCRs.
AB-MECA, labeled with 125I. AB-MECA acts as an agonist at adenosine A3 receptors, a group of GPCRs that are potential drug targets for immune-related disease, including rheumatoid arthritis, cancer, ischaemia, and inflammatory disease.
α-bungarotoxin, labeled with 125I on tyrosine residue 54. α-bungarotoxin is a snake venom neurotoxin that acts as an antagonist at nicotinic acetylcholine receptors (nAChRs). This product as offered at two specific activities. Specific activity indicates how much radioactivity there is per molecule of ligand. Several of our 125I-labeled ligands are offered at maximum specific activity (2200 Ci/mmol if one 125I labeling site is available). This indicates that virtually every molecule of ligand provided in the stock vial is radiolabeled.
NEX434 [125I]- α-Dendrotoxinsare a class of neurotoxins produced by mamba snakes that block particular subtypes of voltage-gated potassium channels in neurons. Dendrotoxins enhance the release of acetylcholine at neuromuscular junctions.
Epibatidine, labeled with 125I. Epibatidine has analgesic activities, has been shown to function as an agonist at nicotinic acetylcholine receptors, and has been shown to bind muscarinic and serotonin 5-HT3 receptors.