comparison of the tufa nucleotide sequence with the tufb sequence ( an and friesen , 1980 ) and the known amino acid sequence of ef-tu ( arai et al. , 1980 ) revealed that the products of genes tufa and tufb are identical except for one amino acid at the c-terminal , i.e. , glycine for tufa and serine for tufb .
C0002520
amino acid
C0017890
glycine