The cleavage of the scissile bond of substrates as oxytocin and vasopressin is anticipated to take place after a nucleophilic attack by water assisted by the carboxylate function of Glu465 in the active site of IRAP
None of these peptides are currently approved by major regulatory agencies, and while some are used off-label in sports medicine, peptides like TB-500 and GHK-Cu are monitored substances under WADA regulations, raising concerns about doping violations in athletic contexts
Sports Med 38:297316 da Silva DK, Jacinto JL, de Andrade WB, Roveratti MC, Estoche JM, Balvedi MCW et al (2017) Citrulline malate does not improve muscle recovery after resistance exercise in untrained young adult men
It activates AMPK signaling (the same pathway activated by exercise and caloric restriction), improves insulin sensitivity, enhances glucose uptake by muscle tissue, and supports mitochondrial biogenesis
SAM serves as a major methyl group donor in numerous methylation reactions across various tissues, particularly within the central nervous system, working in reactions that form phospholipids and biogenic amines (65, 67)
