EU478797   Influenza A virus (A/swine/Potsdam/268/81(H1N1)) matrix protein 2 (M2) and matrix protein 1 (M1) genes, complete cds.   [Influenza A virus (A/swine/Potsdam/268/1981(H1N1)) A/swine/Potsdam/268/81 | 1503438.3]