The transcription signature of AID⁺ and CD30⁺ B cells. AID is red-brown; the other marker is purplish in each image. Original magnification ×40.(A) A subset of AID⁺ cells display dotlike CCL22 positivity. (B) AID and JunB are largely nonoverlapping. (C-E) AID⁺ cells (red brown) inside and outside the GC (star) are E47⁺, Id2^–, and largely cMYC^–. (E-G) By comparison, CD30⁺ cells (red brown) show a reversed staining pattern, being E47^– but Id2⁺ and cMYC⁺. Scale bar: 1 μm at ×40, 4 μmat ×10, and 10 μmat ×4.