Table 1.

Surface markers and genotype of IL-7-dependent progenitor B-cell lines that grow independent of stroma

Cell line	Wild-type abl	Surface expression
		CD43	B220	IgM
AN-1	−	+	+	−
AP-1	+	+	+	−
AN-2	−	+	+	+
AP-2	+	+	+	−
AN-3	−	+	+	−
AP-3*	+	+	−	+

^*Heterozygous for the mutant abl allele.