Chiwerewere ndi katundu wamakono a ma molekyulu ndi ions. Mayi molecule / ion sichinthu chachikulu pachithunzichi. Kukhalapo kwa malo osaphatikizika a carbon ndi chimodzi mwa zinthu zambiri zomwe zimapangitsa kuti tizilombo tizilombo timene timapanga.
Nthawi zambiri anthu amadziwika kuti ali ndi dzanja lamanja kapena lamanzere. Chiwerewere ndi chofunika kwambiri pakukambirana za stereochemistry m'zinthu zamakono komanso zachilengedwe. Lingaliroli ndi lofunika kwambiri chifukwa ma bilolecules ambiri ndi mankhwala ndi chiral.
Mitundu yambiri yamagulu yambiri imakhala ndi chiral, kuphatikizapo mavitamini amino (omwe amapangidwa ndi mapuloteni) ndi shuga. Muzinthu zamakono, ambiri mwa mankhwalawa ali ofanana ndi achirombo: ambiri amino acid ndi opaleshoni (l) ndi shuga ndi dextrorotatory (d). Mapuloteni omwe amapezeka mwachilengedwe amapangidwa ndi amino acid ndipo amatchedwa mapuloteni ochepa. Mankhwala a amino amodzi oterewa amapanga mapuloteni amanja.

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