Figure 2From: ErbB3 is required for ductal morphogenesis in the mouse mammary glandAnalysis of epithelial outgrowth. Diamonds represent the average end to end length of total ductal outgrowth measured in arbitrary units in a transplanted gland at (a) 4 weeks and (b) 7 weeks for the null and wild-type or heterozygous (Wt/het) donor genotypes. The average numbers of branchpoints within a unit area are shown for (c) 4 weeks and (d) 7 weeks after transplantation. (e) Ductal outgrowths for 20 weeks after transplantation, mid-pregnancy, and 1 day postpartum (1D PP) are shown together. In all panels, solid lines connect the null with the Wt/het pair of contralateral transplants from the same recipient mouse. Dotted lines connect the mean of the outgrowths from contralateral glands in complete null-Wt/het pairs, and the mean lengths are listed at the termini of these lines. Asterisks represent the mean from all recipients of a given genotype, with mean lengths presented in italics in panels b and d.Back to article page