[[Organic Organic]] [[acid]] with at least one NH2 group. About 25 [[amino acid|amino acids]] are involved in the construction of [[protein|proteins]].
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[[Organic Organic]] [[Sauer/en|acid]] with at least one NH2 group. About 25 [[Aminosäure/en|amino acids]] are involved in the construction of [[Eiweißkörper/en|proteins]].