Ingolia T D, Koshland D E
J Bacteriol. 1979 Dec;140(3):798-804. doi: 10.1128/jb.140.3.798-804.1979.
Salmonella typhimurium responds chemotactically to gradients of divalent cations in the presence of citrate ions. The actual chemoeffector is the citrate-metal ion complex, which acts as an attractant. Citrate (which is also a chemoeffector for Salmonella) and the citrate-metal ion complex are recognized by different receptors. The response of Salmonells, which can transport citrate through its membrane, is quite different than that of Escherichia coli, which cannot.
鼠伤寒沙门氏菌在柠檬酸盐离子存在的情况下,会对二价阳离子梯度产生趋化反应。实际的化学效应物是柠檬酸盐 - 金属离子复合物,它作为一种吸引剂起作用。柠檬酸盐(它也是沙门氏菌的一种化学效应物)和柠檬酸盐 - 金属离子复合物由不同的受体识别。能够通过其细胞膜转运柠檬酸盐的沙门氏菌的反应,与不能转运的大肠杆菌的反应有很大不同。