in this study the substrate specificity of the two forms has been further delineated by correlating activities in different individuals with various substrates . m-tyramine , noradrenaline , adrenaline , 5-hydroxytryptamine , p-hydroxyamphetamine , isoprenaline , salbutamol and l-naphthol were all specific substrates for the m form of the enzyme .
C0028351
noradrenaline
C0014563
adrenaline