摘要:, targeting exons 5 and 6 which encode the catalytic domain of TPH1. By crossing the new Tph1 floxed mice with villin-Cre or insulin-Cre mice, we observed near-complete ablation of 5-HT production in the intestine and β cells. In conclusion, this improved Tph1 floxed mouse model will serve as useful and accurate tool for analyzing peripheral 5-HT system.