The entry of influenza virus into cells and amatadine Endosome M2, this viral protein forms a channel in the membrane that D actively pumps protons the endosome into the interior of the virion. These protons lower the ph in the interior of the virion, releasing the viral rNas from m1. in this R way the rnas can enter the nucThe entry of influenza virus into cells and amatadine M2, this viral protein forms a channel in the membrane that actively pumps protons from the endosome into the interior of the virion. These protons lower the pH in the interior of the virion, releasing the viral RNAs from M1. In this way the RNAs can enter the nucleus