In line with strong and stable interactions of His1-Ala2 of GLP-1 compared with transient interactions of His1-Gly2 in exendin-4, truncation of these two N-terminal residues reduces GLP-1 affinity by 100300 fold, whereas for exendin-4, this has no effect, albeit, for both peptides, these residues are required for GLP-1R-mediated cAMP production 22,23,24,25
L-cysteine represents the rate-limiting factor in cellular glutathione production
Shahi SK, Jensen SN, Murra AC, Tang N, Guo H, Gibson-Corley KN, et al
Impact of GEP44 and GEP12 on food intake and body weight in DIO rats compared to responses to Ex-4 Data from the dose escalation experiment conducted in DIO rats indicated that treatment with low doses (0.5 to 10 nmol/kg/d) of GEP44 and Ex-4 resulted in similar anorectic effects (Fig