Putative holin-2 family
The Putative Holin-2 Family is a large family with members from a wide variety of bacteria. As of early 2016, functional data is not available for members of the PH-2 family, but based on their size and topology, it is believed they act as holins to facilitate cell lysis. PH-2 family proteins are of 130 to 210 amino acyl residues in length and may exhibit 1 or 2 transmembrane segments. A representative list of proteins belonging to the PH-2 family can be found in the .