Human LSP1 expression in Sf9 cells causes formation of hairlike, filamentous projections. Shown are DIC photomicrophs on Sf9 cells infected for 48 hours with either (A) recombinant CAT baculovirus or (B and C) recombinant huLSP1 baculovirus which overexpress the polyhisCAT and polyhis-huLSP1 in Sf9. Note branches (arrowhead) of hairlike projections.