NP-holin family
The Neisserial Phage-associated Holin Family is a family of small proteins, between 47–53 amino acyl residues in length, that exhibit a single N-terminal transmembrane segment. Although annotated as phage proteins or holins, NP-Holin proteins are not yet functionally characterized, thus more research is needed to confirm holin activity. A representative list of proteins belonging to the NP-Holin family can be found in the .