label: N(6)-dimethyladenosine(N)/N(6)-dimethyladenosine(N+1) in rRNA + 4 S-adenosyl-L-homocysteine + 4 H(+) => adenosine(N)/adenosine(N+1) in rRNA + 4 S-adenosyl-L-methionine
label_lc: n(6)-dimethyladenosine(n)/n(6)-dimethyladenosine(n+1) in rrna + 4 s-adenosyl-l-homocysteine + 4 h(+) => adenosine(n)/adenosine(n+1) in rrna + 4 s-adenosyl-l-methionine