comparison of the amino acid sequence to those of other flavoproteins revealed two separate domains that are likely to be involved in flavin binding : a long segment ( residues 77-228 ) homologous with desulfovibrio vulgaris flavodoxin , an fmn-containing protein , and a shorter segment ( residues 452-477 ) homologous with the fad-binding segment of fumarate reductase from escherichia coli .
C0016223
flavoproteins
C0033684
protein