Contents

11 May 2021
Vol 14, Issue 682

About The Cover

Cover image expansion

Online Cover This week features a Research Article that demonstrates that the activation of the kinase ERK in B cells depends on RAFs only during some stages of differentiation. The image shows B cells within (blue) and surrounding (red) germinal centers in the spleen of an immunized mouse. [Image: Scheffler et al./Science Signaling]