In calling the immunity repressor of a phage JF2 (gp71), we came across a peculiar finding. It seems that the immunity repressor's open reading frame has less coding potential than another open reading frame in that area. Don't be fooled! JF2's immunity repressor shows hits in HHPred to the HTH DNA binding site (N-terminus).
Read Pope, et al 2011a for info about Bxz2's broken repressor. However, our gene doesn't match that N terminus either.
Many (did I say many?) phages have miscalled the open reading frame as the immunity repressor. Be careful. We will fix as soon as we can.