label: N(7)-methylguanosine(527) in 16S rRNA + S-adenosyl-L-homocysteine => guanosine(527) in 16S rRNA + S-adenosyl-L-methionine
label_lc: n(7)-methylguanosine(527) in 16s rrna + s-adenosyl-l-homocysteine => guanosine(527) in 16s rrna + s-adenosyl-l-methionine