BP holin family
The β-proteobacterial holin (BP-Hol) family (TC# 1.E.50) is a small family that includes members derived from a number of Burkholderia phage as well as a Poloromonas species. As of April 3, 2016, this family belongs to the Holin superfamily II. Members of Saier Bioinformatics Lab at University of California, San Diego found that the BP-Hol family is most closely related to the T7 holin family (TC# 1.E.6).