Eberhard August Wilhelm Zimmermann von onimo eranko omo orile  ede Jemani ni o koko se apejuwe eranko yii ni odun 1780.. 
A lè pín wọn gẹ́gẹ́  bí ìrísí àti ayé tí àwọn ẹgbẹ́ oníṣé wọn wà, bíi alpha- (αdárúkọ beta- (BRWdù gamma- (G-) or Delta- (d-) amino acid; àwọn ẹ̀ka tókù ní láti ṣe pẹ̀lú ọ̀pọ̀ ọ̀pọ̀ Ph àti oníṣé irú irú ìsọmọ ẹgbẹ́ (aliphatic, A),[, aromatic, tí ó ní hydroxyl àti sulfur, àti bẹ́ẹ̀bẹ́ẹ̀ lọ. 