label: glycyl-[protein] + reduced [flavodoxin] + S-adenosyl-L-methionine => glycin-2-yl radical-[protein] + semiquinone [flavodoxin] + 5'-deoxyadenosine + L-methionine + H(+)
label_lc: glycyl-[protein] + reduced [flavodoxin] + s-adenosyl-l-methionine => glycin-2-yl radical-[protein] + semiquinone [flavodoxin] + 5'-deoxyadenosine + l-methionine + h(+)