Tisa L S, Olivera B M, Adler J
Department of Biochemistry, University of Wisconsin-Madison 53706-1569.
J Bacteriol. 1993 Mar;175(5):1235-8. doi: 10.1128/jb.175.5.1235-1238.1993.
Escherichia coli chemotaxis was inhibited by omega-conotoxin, a calcium ion channel blocker. With Tris-EDTA-permeabilized cells, nanomolar levels of omega-conotoxin inhibited chemotaxis without loss of motility. Cells treated with omega-conotoxin swam with a smooth bias, i.e., tumbling was inhibited.
ω-芋螺毒素(一种钙离子通道阻滞剂)可抑制大肠杆菌的趋化作用。对于经Tris-EDTA通透处理的细胞,纳摩尔浓度的ω-芋螺毒素可抑制趋化作用而不影响其运动能力。用ω-芋螺毒素处理的细胞游动时具有平滑的偏向性,即翻滚受到抑制。