Lysis S proteins have two transmembrane segments (TMSs), with both the N- and C-termini on the cytoplasmic side of the inner membrane.
[4] It may function in toxin export as has been proposed for the X. nematophila holin-1 (TC #1.E.2.1.4).
[5] A representative list of proteins belonging to the P21 holin family can be found in the Transporter Classification Database.
As of 10 March 2016, this article is derived in whole or in part from Transporter Classification Database (TCDB).
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