Deduced amino acid sequences of Calanus finmarchicus amine biosynthetic enzymes and their functional domains as predicted by the online program Pfam. (A) Calanus finmarchicus tryptophan-phenylalanine hydroxylase. (B) Calanus finmarchicus tyrosine hydroxylase. (C) Calanus finmarchicus DOPA decarboxylase. (D) Calanus finmarchicus histidine decarboxylase. (E) Calanus finmarchicus tyrosine decarboxylase. (F) Calanus finmarchicus tyramine β-hydroxylase. (G) Calanus finmarchicus tryptophan hydroxylase. Highlighting code for functional domains identified by Pfam: ACT, green; biopterin-dependent aromatic amino acid hydroxylase, yellow; pyridoxal-dependent decarboxylase conserved, blue; DOMON, pink; copper type-II ascorbate-dependent monooxygenase N-terminal, red; copper type-II ascorbate-dependent monooxygenase C-terminal, dark red.