Tachykinins are active peptides which excite neurons, evoke behavioral responses, are potent vasodilators and secretagogues, and contract (directly or indirectly) many smooth muscles. Tachykinin-related peptide 1: Expressed in antennal lobe (AL) and gnathal ganglion (GNG) (at protein level). Expression in AL detected in all animals, in GNG in most animals (at protein level). Not expressed in corpora cardiaca (CC) and corpora allata (CA) (at protein level). Tachykinin-related peptide 2: Expressed in antennal lobe (AL) corpora cardiaca (CC) and corpora allata (CA) with expression detected in few animals (at protein level). Not expressed in gnathal ganglion (GNG) (at protein level). Tachykinin-related peptide 4: Expressed in corpora cardiaca (CC), corpora allata (CA), antennal lobe (AL) and gnathal ganglion (GNG) (at protein level). Expression in AL and GNG detected in most animals, in CC and CA detected in few animals (at protein level). Tachykinin-related peptide 5: Expressed in corpora cardiaca (CC), corpora allata (CA), antennal lobe (AL) and gnathal ganglion (GNG) (at protein level). Expression in CC and CA detected in some animals, in AL and GNG in few animals (at protein level). Tachykinin-related peptide 6: Expressed in antennal lobe (AL) and gnathal ganglion (GNG) (at protein level). Expression in AL detected in all animals, in GNG in some animals (at protein level). Not expressed in corpora cardiaca (CC) and corpora allata (CA) (at protein level). Tachykinin-related peptide 1. Tachykinin-related peptide 2. Tachykinin-related peptide 4. Tachykinin-related peptide 5. Tachykinin-related peptide 6. Belongs to the tachykinin family.