type 1 error occurs when endogenous substrates ( e.g . l-carnitine ) are acetylated by acetyltransferase enzymes ( e.g . carnitine acetyltransferase ( carac ) ) yielding an acetylated product mistaken for acetylcholine ( acch ) .
C0001068
acetyltransferase
C0007259
carnitine acetyltransferase