a thiol + S-adenosyl-L-methionine = a methyl thioether + S-adenosyl-L-homocysteine + H(+)
a thiol + s-adenosyl-l-methionine = a methyl thioether + s-adenosyl-l-homocysteine + h(+)
"thiol S-methyltransferase"
"thiol s-methyltransferase"