adenosine(9) in tRNA + S-adenosyl-L-methionine = N(1)-methyladenosine(9) in tRNA + S-adenosyl-L-homocysteine + H(+)
adenosine(9) in trna + s-adenosyl-l-methionine = n(1)-methyladenosine(9) in trna + s-adenosyl-l-homocysteine + h(+)
"tRNA m(1)A(9)-methyltransferase"
"trna m(1)a(9)-methyltransferase"