 3-Hol family

The Putative 3 TMS Holin (3-Hol) Family (TC# 1.E.56) is large, consisting of many members derived from proteobacteria and their phage, all of small size (85-105 amino acyl residues in length) and usually with 3 transmembrane segments (TMSs).A representative list of the proteins belonging to this family can be found in the Transporter Classification Database.