<P> The N - terminus ( also known as the amino - terminus , NH - terminus , N - terminal end or amine - terminus ) is the start of a protein or polypeptide referring to the free amine group ( - NH ) located at the end of a polypeptide . Normally the amine group is bonded to another carboxylic group in a protein to make it a chain , but since the end of a protein has only 1 out of 2 areas chained , the free amine group is referred to the N - terminus . By convention , peptide sequences are written N - terminus to C - terminus , left to right in LTR languages . This correlates the translation direction to the text direction ( because when a protein is translated from messenger RNA , it is created from N - terminus to C - terminus - amino acids are added to the carbonyl end ) . </P>
<P> The N - terminus ( also known as the amino - terminus , NH - terminus , N - terminal end or amine - terminus ) is the start of a protein or polypeptide referring to the free amine group ( - NH ) located at the end of a polypeptide . Normally the amine group is bonded to another carboxylic group in a protein to make it a chain , but since the end of a protein has only 1 out of 2 areas chained , the free amine group is referred to the N - terminus . By convention , peptide sequences are written N - terminus to C - terminus , left to right in LTR languages . This correlates the translation direction to the text direction ( because when a protein is translated from messenger RNA , it is created from N - terminus to C - terminus - amino acids are added to the carbonyl end ) . </P>
what is n and c terminus in protein
what is n and c terminus in protein
amino acids
amino acids