Relative gene expression levels of combined array and QRT-PCR analyses of P4, P5, P6 and P7. Differentiation markers are presented relative to P4 (set at 100). A, differentiation markers: miscellaneous cell surface or secreted factors. B, differentiation markers: miscellaneous transcription factors.
Laslett et al. BMC Developmental Biology 2007 7:12 doi:10.1186/1471-213X-7-12