Low-potential electron donor to a number of redox enzymes (By similarity). MGKIGIFFGTDSGNAEAIAEKISKAIGNAEVIDVAKASKEQFNGFTKVILVAPTAGAGDLQTDWEDFLGTLEASDFANKTIGLVGLGDQDTYSETFAEGIFHIYEKAKAGKVVGQTPTDGYHFEASKAVEGGKFVGLVIDEDNQDDLTDERIAKWVEQVKGSFA fldA Flavodoxin FLAV_HELPJ jhp_1088 164