The amino group generally bears either an acetyl or glycolyl group, but other modifications have been described.
ໂດຍທົ່ວໄປ, ກຸ່ມ amino ມີທັງກຸ່ມ acetyl ຫຼືກຸ່ມ glycolyl, ແຕ່ວ່າການດັດແປງອື່ນໆໄດ້ຖືກອະທິບາຍໄວ້.