label: an adenosine in mRNA + S-adenosyl-L-methionine = an N(6)-methyladenosine in mRNA + S-adenosyl-L-homocysteine + H(+)
label_lc: an adenosine in mrna + s-adenosyl-l-methionine = an n(6)-methyladenosine in mrna + s-adenosyl-l-homocysteine + h(+)