Reconstitution of mice injected with either mutant or normal marrow. The percentage isotype Gpi1b was determined for normal recipient mice (genotype: C57BL6/J-+^hbd/+^hbd, Gpi1^a/Gpi1^a, Igh^a/Igh^a, Thy1^a/Thy1^a ) that were transplanted with either HBD or normal marrow. Identification numbers for individual mice are indicated at the right of each graph. (A) Leukocyte reconstitution for recipients of normal marrow. (B) Leukocyte reconstitution for recipients of mutant marrow. (C) RBC reconstitution for recipients of normal marrow. (D) RBC reconstitution for recipients of mutant marrow.