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1.E.61.  The Pseudomonas phage phiKMV (PpKMV holin) Family 

This family is small with only a few proteins, and the holins are also small, of about 66 aas with a single TMS. 

References associated with 1.E.61 family:

Briers, Y., L.M. Peeters, G. Volckaert, and R. Lavigne. (2011). The lysis cassette of bacteriophage ϕKMV encodes a signal-arrest-release endolysin and a pinholin. Bacteriophage 1: 25-30. 21687532