Escherichia coli%E2%80%99s literal link to infection Exploring mutagenesis of the FimH adhesin to allosterically %E2%80%9Clock%E2%80%9D in low-affinity %D8%B1%D8%B3%D8%A7%D9%84%D8%A9 %D8%AF%D9%83%D8%AA%D9%88%D8%B1%D8%A7%D9%87