Functional interaction of region 4 of the extracytoplasmic function sigma factor FecI with the cytoplasmic portion of the FecR transmembrane protein of the Escherichia coli ferric citrate transport system

大肠杆菌柠檬酸铁转运系统胞外功能σ因子FecI的第4区与FecR跨膜蛋白胞质部分的功能性相互作用