tokens: Sequence comparison of cytochromes bd and their homologs from various organisms demonstrates that the proteins can be classified into two subfamilies , a proteobacterial type including E. coli bd and a more widely distributed type including the B. stearothermophilus enzyme , suggesting that the latter type is evolutionarily older .
folded_tokens: sequence comparison of cytochrome bd and they homolog from various organism demonstrate that the protein can be classify into two subfamily , a proteobacterial type include e. coli bd and a more widely distribute type include the B. stearothermophilus enzyme , suggest that the latter type be evolutionarily older .