Synthetic version of exendin-4, originally isolated from the saliva of the Gila monster (Heloderma suspectum). First GLP-1 receptor agonist, FDA-approved 2005 as Byetta. Weekly depot form Bydureon approved 2012.
Exenatide is a 39-amino-acid peptide with about 53% sequence homology to human GLP-1. A glycine substitution at position 2 prevents dipeptidyl-peptidase-IV cleavage and extends the half-life from native GLP-1 (minutes) to about 2.4 hours. GLP-1 receptor activation glucose-dependently stimulates insulin secretion, inhibits glucagon and delays gastric emptying.
Theoretical concentration curve at a half-life of 2.4 h. Pure pharmacokinetic model — not a dosing recommendation.
Open in PK tool →Peptides ship as a dry powder. Once dissolved in a liquid (reconstitution), this calculator answers a single question: how much substance is in one millilitre of solution afterwards?
These cofactors relate to the peptide class, not to a specific use. No recommendation, no dosing.
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