derives_from part_of mature_protein_region BS:00149 sequence The polypeptide sequence that remains when the cleaved peptide regions have been cleaved from the immature peptide. SO:0000419 mature protein region INSDC_feature:mat_peptide mature peptide chain This term mature peptide, merged with the biosapiens term mature protein region and took that to be the new name. Old def: The coding sequence for the mature or final peptide or protein product following post-translational modification. polypeptide_region immature_peptide_region mature_protein_region_of_CDS