Upadhye, A., Marshall, M., Garmey, J. C., Bender, T. P., McNamara, C. Retroviral Overexpression of CXCR4 on Murine B-1a Cells and Adoptive Transfer for Targeted B-1a Cell Migration to the Bone Marrow and IgM Production. J. Vis. Exp. (159), e61003, doi:10.3791/61003 (2020).