chemoreceptor deaminase, required for methylation of methyl-accepting chemotaxis proteins by [[protein|1217807AE3AE3A654BA0DD4AF5ADF1CEE62632B6]], enhances phosphatase activity of [[protein|DC9B5446484E42F46EB2B0541192D7D8B4B3AC8F]], required for full [[protein|8333CD46F704F03A22482CAA98DEFCC945362A10]] activity