http://www.creative-diagnostics.com/Anti-Octopamine-Antibody-3495-147.htm

Using a conjugate octopamine-Pc, antibody specificity was performed with an ELISA test by competition experiments with the following compounds : Compounds Cross-reactivity ratio (a) Octopamine-G-PC   1 Tyramine-G-PC 1/400 Noradrenaline-G-PC   1/10,000 Tyrosine-G-PC  1/>50,000 Dopamine-G-PC  1/100,000 (a) : Octopamine-G-(Pc) concentration / other conjugated catecholamine concentration at half displacement; G = Glutaraldehyde