1.A.117.1.4
Membrane matrix (M) glycoprotein of 261 aas and 3 strongly hydrophobic TMSs in the N-terminal half of the protein, preceded by a single N-terminal TMS (possibly a targetting signal sequence), followed by a relatively hydrophilic C-terminal half that includes 3 weakly hydrophobic peaks that could be transmembrane but probably are not.  These properties are characteristic of many but not all of the members of this family, including members of both sub-families, 1.A.57.1 and 1.A. 57.2.