Specificity：Recognizes the formaldehyde conjugate of serotonin. Without paraformaldehyde treatment, it cross-reacts in liquid phase with dopamine and tryptamine in hemagglutination tests. Shows no reactivity with catecholamine-containing neurons in formaldehyde fixed preparations. Reacts with serotonin in neurons and recognizes serotonergic sites in fixed tissue sections. By cell agglutination, no cross reactivity with 5-hydroxyindolacetic acid, GABA, noradrenaline, 5-hydroxytryptophan, carnosine or melatonin.
