The isolation and sequencing of human gastric inhibitory peptide (GIP).

FEBS letters (1984-07-09)
A J Moody, L Thim, I Valverde
ABSTRACT

Human GIP 1-42 and fragments of human GIP corresponding to GIP 10-42, GIP 11-42, and GIP 17-42 were isolated from acid-ethanol extracts of human small intestines with the aid of an anti-GIP serum specific for the extreme C-terminal portion of the GIP molecule. The full sequence of human GIP has been established by Edman degradation of these peptides and fragments thereof by automatic gas-phase sequencing. Human GIP differs from porcine GIP at residues 18 and 34. The sequence of human GIP is thus: (Formula: see text) Amino acid residues 18 and 34 are Arg and Ser, respectively, in porcine GIP.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Gastric Inhibitory Polypeptide human, ≥95% (HPLC)