Table 3.

The coexpression of TH components and known marker genes at Stage 30 and Stage 31

stage	gene 1	gene 2	% gene 1+ cells	% gene 2+ cells	% of gene 1+ cells that are also gene 2+	% of gene 2+ cells that are also gene 1+
30	crx	visinin	20.9	19.2	89.4	97.5
30	visinin	crx	17.1	17.3	95.2	93.8
30	dio2	cath5	1.1	16.3	85.7	5.8
30	cath5	dio2	13.5	0.6	4.3	100
30	visinin	TRb	16.7	14.6	60.9	69.6
30	TRb	visinin	17.6	16.3	70.3	75.9
31	neurod	cath5	22.5	9.5	12.4	29.3
31	neurod	TRb	20.4	6.9	30.1	89.3
31	otx2	cath5	28.6	10.4	6	16.5
31	TRb	cath5	8.7	12.3	10.3	7.2
31	TRb	crx	8.5	17.6	87.4	42.1

Cells were labeled in ovo with [³H]-thymidine for 1 hour, and tissue was harvested and dissociated at the indicated times. DISH for the indicated genes and autoradiography for [³H] were carried out on the dissociated cells.