Amino acids na-ahọrọ ịnakwere helical conformations na protein gụnyere methionine, alanine, leucine, glutamate na lysine ("MALEK" na amino-acid 1-letter codes); N'ụzọ dị iche, nnukwu aromatic residues (tryptophan, tyrosine na phenylalanine) na Cβ-branched amino acids (isoleucine, valine, na threonstrine) na-ahọrọ ịnakwere β-andine conformations. Otú ọ dị, mmasị ndị a adịghị ike iji mepụta usoro a pụrụ ịdabere na ya nke ịkọ usoro nke usoro nke abụọ site na iji usoro a. Ajụjụ: Kedu ụdị usoro nke DNA a ga-atụle n'ụzọ a pụrụ ịdabere na ya?
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