ʻO ka'enekino ka waiwai honua o kekahi mau kinikū a me nā kinona. ʻO ka mole mole / ion ka meaʻole i ke kiʻikuhi kiʻi. ʻO ka nohoʻana o kahi pūnaewele kalapona'onihune kekahi o nāʻano hoʻohālikelike e hoʻohuli ai i ka wai i loko o nā molecuka manu a me ka lāʻauʻona.
Hoʻonohonoho pinepineʻia nā mea hoʻohālike e like me ka lima hema a me ka lima hema. He mea nui ka nānāʻana i ke kūpilikiʻi ke kūkākūkāʻana i ka hua'ōlelo stereochemistry i loko o ka māmā'enela a me ka hoʻokele kino. He mea nui loa ka manaʻo no ka meaʻo ka nui o nā biomolecules a me nā mea lapaʻau he chiral.
ʻO nā kinikōʻau he nui keʻano he chiral, e like me nā mea amino acetic (me nā hale hoʻomalu) a me nā meaʻono. I loko o nā'ōnaehana koolamu, ka hapa nui o kēia mau pūnaeho o keʻano o ka wai:ʻo ka nui o nā amino acids, he levorotatory (l) a he surors nā dextrorotatory (d). ʻO nā kinipona maʻamau e hanaʻia ana e nā amino acids aʻikeʻia he mau protein hema; ʻo ka mea e like me nā'āpana amino ac.

Hōʻike i nā mea a pau 4 nā hualoaʻa