(c,d) Normalized ratio between luciferase activity bound to beads and present in lysates. The indicated purified GST fusion proteins coupled to beads were incubated with bacterially expressed Nap1(1-85) fused to luciferase.Reactions were complemented with the indicated amounts of lysates from E. coli cultures expressing myelin basic protein (MBP) fused to NDP52 (d). 