Table 1. Mass spectrometry of WNV NS2B–NS3 samples.

Sample	Molecular weight of major fragments (Da)
Full length	20740.5, 5854.6
Crystals of spontaneous digest	18252.5–18787.5
Solution of trypsin digest	18439.0–18859.5
Solution of 90 h autodigest	20740.5, 18566.5 (6%)