Selective integrin loss but normal expression of selectin and chemokine receptor by HSP90b1 KO B cells. (A) Phenotypic analysis of splenic B cells for the surface expression of indicated molecules (open histogram). Shaded histogram represents background stain with isotype control Ab. (B) In vitro migration assay of WT and KO B cells in response to SDF-1. P > .05. Error bars represent SD.