┌─ Escherichia coli 1044A (21)  
                                                  ┌┴─ Escherichia coli O157:H7 EDL933   
                                        ┌─────────┴┬────────── Escherichia coli 1212A (1)  
                              ┌─────────┤          └────────── Escherichia coli O157:H7 str. EC4076   
                              │         └─────────┬──────────────────── Escherichia coli MS 21-1   
                    ┌─────────┤                   └─ Escherichia coli B185   
          ┌─────────┤         └─ Escherichia coli IAI1 (1)  
          │         └┬────────── Escherichia coli B354   
         ┌┤          └──────────────────── Escherichia coli (21-672/672) E24377A (1)  
        ┌┤└─ Escherichia coli (21-672/672) 042 (9)  
        │└┬────────── Escherichia coli MS 69-1   
┌───────┤ └────────── Escherichia coli MS 115-1   
│       │┌────────── Escherichia coli MS 84-1   
│       └┤         ┌─────────────────────────────────────── Escherichia coli MS 107-1   
│        │         │            ┌─ Escherichia coli (3-654/654) K12 (5)  
│        └─────────┤           ┌┴────────── Escherichia coli str. K-12 substr. DH10B   
│                  │ ┌─────────┴────────── Escherichia coli (DE3) BL21(DE3)   
│                  └┬┴────────── Escherichia coli B str. REL606 (2)  
┤                   └┬────────── Escherichia coli KO11 (2)  
│                    └┬─ Escherichia coli (21-672/672) 53638 (25)  
│                     └┬──────────────────── Escherichia coli MS 116-1 (1)  
│                      └────────── Escherichia coli (21-672/672) HS (1)  
│                            ┌─────── Escherichia coli H299   
│          ┌─────────────────┴─────────────────────── Escherichia coli FVEC1302 (3)  
│┌─────────┴────────── Escherichia coli IAI39 (1)  
└┤          ┌─ Escherichia coli SE15   
 └┬─────────┴───────────────────────────── Escherichia coli TA280   
  └┬────────── Escherichia coli (21-672/672) E2348/69   
   └┬────────── Escherichia coli M605   
    └┬────────── Escherichia coli (21-672/672) F11 (4)  
     └┬─────────────────── Escherichia coli ED1a (1)  
      └┬─ Escherichia coli 2362-75 (2)  
       └──────────────────┬─ Escherichia coli NC101   
                          └─────────┬──────────────────── Escherichia coli (21-672/672) APEC O1 (6)  
                                    └─ Escherichia coli (21-672/672) CFT073 (5)  
  

  
Signal transduction histidine kinase CheA (EC 2.7.3.-)
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