Table 1.

Autologous marrow transplantation (AMT) studies in elderly female Safari cats

Cat	Age, years	Time after AMT, months	% of cells with d G6PD
			Progenitors	Granulocytes	T cells	Marrow fibroblasts
65044	3		60	50	50	60
	12		7	15	60	50
		3	7	10	10	50
		15	3	10	5	50
41008	5		7	7	45	55
		3	10	10	10	50
		20	13	10	10	50

Longitudinal data from cat 65044 are presented in Fig. 2. Cat 41008, used in breeding studies of F₂ animals, did not have the G6PD phenotype of her progenitors measured until age 5 years. Values remained unchanged in four determinations over 9 months before transplantation and the percent of progenitors with d G6PD ranged from 2 to 7%, granulocytes from 5 to 10%, and T cells from 40 to 50%. After transplantation, the distributin of G6PD phenotype in T cells became equivalent to that among progenitors and granulocytes, and a balanced distribution of G6PD phenotype persisted among marrow fibroblasts, a nonhematopoietic (control) cell population.