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Influenza A/B Virus M2 Protein (M2) Superfamily

The M2 proteins of Influenza types A and B are homologous in their transmembrane helices and share the active site channel motif: H(X3)W(X3)H.

1.A.19 - The Type A Influenza Virus Matrix-2 Channel (M2-C) Family
1.A.58 - The Type B Influenza Virus Matrix Protein 2 (BM2-C) Family