I think I deleted the message too fast, but did see a question (hopefully!)
as to what CD means.

CD means cluster of differentiation, and pertains to lymphocyte markers:
CD nomenclature. "A surface marker that identifies a particular lineage
or differentiation stage, that has a defined structure, and that is
recognized by a group ("cluster") of monoclonal antibodies is called
a member of CD."

This is quoted from Abbas et al, Cellular and Molecular Immunology,
Third Edition, p 21.  WB Saunders, publisher.  ISBN  0-7216-4024-9.

A book worth having in any immunohistochemistry laboratory,  500 pages of
light! (enlightened reading!)

Gayle Callis