>4U99_1|Chains A, B|NO-binding heme-dependent sensor protein|Shewanella oneidensis (211586) MKGIIFNVLEDMVVAQCGMSVWNELLEKHAPKDRVYVSAKSYAESELFSIVQDVAQRLNMPIQDVVKAFGQFLFNGLASRHTDVVDKFDDFTSLVMGIHDVIHLEVNKLYHEPSLPHINGQLLPNNQIALRYSSPRRLCFCAEGLLFGAAQHFAAAIQISHDTCMHTGADHCMLIIELQNDENLYFQ