Zhou et al. [29] studied the role of GPPGPA, a peptide screened from the skin collagen hydrolysate of Salamandus chinanalis, in T2DM and related molecular mechanisms, and identified the core targets as AKT1, MAPK8, and transcription factor AP-1 (JUN) by network pharmacology. The gene discussed is AKT1; the disease is type 2 diabetes mellitus.