2D linear projection (LP) graphs. Base vectors of projection represent RFP-relevant features. Sites are identified by their positions in the HCV genome and physicochemical properties are shown in parenthesis as X1-X5. See Table 1 for detail. LP graphs of HCV 1b isolates (n = 42) sampled from TOH and IC patients based on A) 12-feature and B) 9-feature projections are shown. To the right of each LP graph is the same graph except for the condition that data points were jittered  to highlight membership and size of clusters.