27 March 2015
Vol 347, Issue 6229

About The Cover

Cover image expansion

COVER The cargo adaptor Bicaudal-D2 (orange) brings the dynein motor complex (yellow) together with its essential cofactor dynactin (red). This giant complex of 37 proteins drags cellular cargos for long distances along microtubules (blue). Cryo–electron microscopy provides insight into the structural assembly and operation of this supracomplex. See page 1441 .
Illustration: Chris Bickel/Science