Di-peptides/tri-peptides Di-peptides/tri-peptides Proton-coupled di- and tri-peptide cotransport Authored: Jassal, B, 2009-06-30 Edited: Jassal, B, 2009-06-30 Pubmed7756356 Pubmed7896779 Pubmed9299407 Reactome Database ID Release 43427998 Reactome, http://www.reactome.org ReactomeREACT_19313 Reviewed: He, L, 2009-08-24 The prototypical transporters of the SLC15 gene family are PEPT1 and PEPT2, which mediate the uptake of every possible di- and tri-peptide. PEPT1 (PTR1) is expressed mainly in the intestine (Liang R et al, 1995; Saito H et al, 1997) while PEPT2 (PTR2) is expressed in the kidney (Liu W et al, 1995).