Cell Types Methods of detection Paused percentage Categories of paused genes Pluripotency relation Reference
Mouse ESCs cultured with serum GRO-seq 39% Pluripotency, DNA damage response, translation, cell cycle, and catabolism Pol II is not significantly paused at developmental regulators. Pluripotency genes are partially paused. [10]
 MEFs GRO-seq 34% DNA damage response, translation, cell cycle, and catabolism Not Discussed [10]
Mouse ESCs cultured with 2i GRO-seq and ChIP-seq of  Pol II Not discussed Cell cycle, signal transduction, and cell proliferation Pol II is not significantly paused at developmental regulators. [14]
Mouse ESCs cultured with 2i ChIP-seq of Pol II Not discussed Not Discussed A general increase in PPP after growth in cells cultured with 2i than with serum. [51]
Mouse iPSCs ChIP-seq of  Pol II Not discussed Oct4 in the later stage of reprogramming Klf4 recruits Cdk9 to the pluripotency promoters. [52]
Human ESCs cultured with serum ChIP-chip of Pol II-S5P 52% Not discussed Not discussed [8]
Human hepatocytes ChIP-chip of Pol II 36% Not discussed Not discussed [8]
Human B cells ChIP-chip of Pol II 42% Not discussed Not discussed [8]
Table 4: A Comparison of PPP analyses in various cell types.