BUB1 and infection: Knockdown of bub1 by dsRNA did not influence the efficiency DCV attachment to S2* cells (4°C at a multiplicity of infection [MOI] of 100) (Fig. 3B; see also Fig. S3D in the supplemental material for the DCV binding kinetic curve, which was in line with linear regression from an MOI of 6.25 to an MOI of 100).