Table 1.

Number of animals by age and genotype used in each experiment

Experiment	Immunocytochemistry	Immunofluorescence	HRP tracing (light microscopy)	HRP tracing (electron microscopy)	Lanthanum tracing	Scanning electron microscopy
Animal postnatal age in days (number/genotype)	10, 14, 20, 30 (4 wt and 4 hyh each age)	6 (6 wt, 6 hyh), 14 (6 wt, 6 hyh), 20 (7 wt, 7 hyh), 30 (3 wt, 3 hyh)	3, 8, 14, 30 (2 wt and 4 hyh each age)	3 (2 each condition), 30 (2 wt, 4 hyh)	3 (3 wt, 5 hyh), 6 (3 wt, 5 hyh), 10 (3 wt, 5 hyh), 20 (5 wt, 5 hyh), 30 (3 wt, 5 hyh)	14 (6 hyh), 20 (10 hyh)