Peptide yaying'ono ya molekyulu imakhala ndi gawo lofunikira m'maselo, sikuti imangopereka zakudya komanso kukonza, komanso imapangitsa kuti ntchito zitheke, pomwe zili ndi udindo wonyamula zida ndi zida.
Ma peptides ang'onoang'ono a molekyulu amathandizira kuti ma membrane am'mimba am'mimba azitha kutulutsa (m'mimba mucosa, khoma la capillary, alveolar, membrane ya meningeal, khoma lofiira lamagazi, glomerular basement membrane), amatha kuyamwa bwino michere, kutulutsa poizoni, ndikuteteza ku tizilombo toyambitsa matenda.
Ma molekyulu ang'onoang'ono a peptide amapereka ma amino acid osiyanasiyana, omwe angathandize thupi kupanga minofu yatsopano m'malo mwa minyewa yowonongeka.