I-Peptide yi-biochemical substance phakathi kwe-amino acid kunye neprotheni. Inobunzima bemolekyuli encinci kuneprotheni, kodwa ubunzima bemolekyuli enkulu kune-amino acid. Liqhekeza leprotheni. Oko kukuthi, ukusuka ngaphezulu kwesibini okanye ukuya kuthi ga kwishumi le-amino acid peptide bond polymerization ibe yipeptide, kwaye ke ukusuka kwiipeptides ezininzi ezinamatyathanga epolymerization ukuya kwiproteni. I-amino acid ayinakubizwa ngokuba yi-peptide, kufuneka ibe ngaphezulu kwee-amino acid ezimbini ezidityaniswe yikhompawundi yekhonkco lepeptide ukuze kuthiwe yipeptide; Uninzi lweeamino acids ezixutywe kunye azibizwa ngokuba ziipeptides; Ii-amino acids kufuneka zidityaniswe ngamabhondi e-peptide, zenze "ikhonkco le-amino acid", "umtya we-amino acid", umtya we-amino acid unokubizwa ngokuba yi-peptide. .