4-Hydroxy-L-(+)-2-phenylglycine is a carnitine palmitoyltransferase-1 inhibitor. 4-Hydroxy-L-(+)-2-phenylglycine improves whole-body glucose tolerance and insulin sensitivity in high-fat diet-induced obese mouse with insulin resistance.

[Met5]-Enkephalin, amide is an agonist for δ opioid receptors as well as putative ζ (zeta) opioid receptors.Met-enkephalin circulates in several forms, some of which may be derived from proteins other than proenkephalin A, and plasma levels of both free native, and peptidase-derivable Met-enkephalin are modulated physiologically.

Type A Allatostatin I b