Metalelogun ni awon proteinogenic ("iseda-protein") amino acid naa   ti won maa n sopo mo peptide ("polypeptides") lati seto ipile fun awon opolopo protein.. 
 ọ̀pọ̀lọpọ̀ àwọn ewì rẹ̀ ni wọ́n ti sọ di orin, àwọn olùkọ́-orin bí arabìrin H.. 