Autoantibodies in MRL/lpr mice treated with CY/2X/Bone/2BMT (Experimental protocol 2). RFs and anti-ss DNA Abs were measured at 48 weeks after the treatment (64 weeks of age). Autoantibodies in normal C57BL/6 and untreated MRL/lpr mice were measured at 18 weeks of age. The results are expressed as the mean ± SD at 405 nm from 5 mice. Asterisks (* and **) represent Pvalues of treated versus untreated MRL/lpr mice; *P < .005 and **P < .001.