... neuro-peptides such as the TK and TKRP family is correla-ted with the evolution and divergence of the nervoussystem and their biological roles, and thus, functionalcharacterization of oct-TKs and oct-TKRPs ... oct-TKRPR, TKRPR and TKR family. The amino acid sequence of oct-TKRPR was aligned with those of the TKRPRs (UTKR, NKD, STKR, and DTKR), and TKRs (mouse NK1R, NK2R and NK3R, and Ci-TK-R) usingCLUSTALW. ... insects and several other invertebrates, avariety of biological activities of TKRPs, such as the contraction of the hindgut and oviduct, depolarizationor hyperpolarization of several neurons, and...