Table 2. Receptors for several growth factors secreted by brain endothelial cells and pericytes are highly expressed by purified CSMNs.

Expression levels in arbitrary units derived from Affymetrix GCOS software. VC- expression level of indicated ligand in acutely purified postnatal vascular cells, from R. Daneman et al. (submitted).

Gene	Probe set	Whole cortex (P3)	CSMNs (P3)	CSMNs (P7)	Ligand	Probe set	VC
igf2r	1367636_at	446	387	337	IGF2	1448152_at	7156
cxcr4	1389244_x_at	2173	3286	2815	CXCL12	1417574_at	7874
ptprz1	1368350_at	5506	3093	2705	PTN	1448254_at	9003
tgfβr1	1376636_at	3406	4165	2435	TGFβ2	1450923_at	2350
itgb1	1368819_at	2079	2505	2209	Sema7a	1459903_at	6140
ntrk2	1368972_at	3371	1896	1688	BDNF	1422169_a_at	20
igf1r	1368123_at	576	211	196	IGF1	1419519_at	88