Methionylserine (H-MET-SER-OH), a dipeptide composed of methionine and serine, demonstrates effective binding and translocation through the intestinal di/tri-peptide transporter 1 (hPEPT1), possessing a K_m value of 0.2 mM. It also exhibits inhibition of ACE enzyme activity, rendering it useful in hypertension research [1] [2].