>sp|P0A2Q9|MERR_SHIFL Mercuric resistance operon regulatory protein OS=Shigella flexneri GN=merR MENNLENLTIGVFAKAAGVNVETIRFYQRKGLLREPDKPYGSIRRYGEADVVRVKFVKSA QRLGFSLDEIAELLRLDDGTHCEEASSLAEHKLKDVREKMADLARMETVLSELVCACHAR KGNVSCPLIASLQGEAGLARSAMP