digestive tube
6.The results showed that the engineered chimera polypeptide exerted obvious inhibitory activity to α amylase from digestive tube of the roach ( Periplaneta americana ) at pH 5.5 with the concentration of 9.5×10 -5 mol/L, and also exerted 36% of the neurotoxic activity of the natural huwentoxin I as shown by the experiments of blockage of the neuromuscular transmission of isolated mouse phrenic nerve diaphragm preparations.

