Virion-associated influenza virus proteins identified by mass spectrometry.

aGel slices were numbered consecutively from the top to the bottom of an 8�C16% gel.bFrom a higher percentage gel.cObserved peptides include all peptides that differ either by sequence, modification or charge.dValues represent the range when the protein was found in multiple gel slices.eA Mascot score ��50 and a Protein prophet score ��0.95 are equivalent (pfSequence coverage is based on peptides with unique sequence.