Correlation between the expression fold change level of 15 randomly selected differently expressed genes between GC-1spg and GC-2spd (ts).

<p>The selected genes cover different expression levels of both up- and down-regulated genes defined by digital gene expression, and the fold change level validated by qPCR. Gene expression levels are presented at the normalized gene expression levels in primary spermatocytes, relative to type B spermatogonia.