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. 2020 Mar 12;11:1345. doi: 10.1038/s41467-020-15180-5

Fig. 3. SSRP1 counteracts histone H1-dependent inhibition of origin assembly.

Fig. 3

a Western blot (WB) of the indicated proteins bound to chromatin isolated from SN incubated with mitotic or interphase extracts for the indicated times. b WB of the indicated proteins bound to chromatin isolated from SN pre-incubated with 200 ng/μl recombinant SSRP1 or control buffer and transferred to interphase extracts for the indicated times. SSRP1 input is 10% of the total. c WB of chromatin isolated from interphase egg extracts supplemented with sperm nuclei pre-incubated with buffer (−) or purified histone H1 (+) at a final concentration of 2 μM for 30 min in the presence of 200 ng/μl recombinant SSRP1 or control buffer and probed with the indicated antibodies. d Representative autoradiography of replication time course assay. Sperm nuclei were pre-incubated for 30 min with 200 ng/μl recombinant SSRP1, 2 μM histone H1, or both and then transferred to interphase extracts. Samples were taken at the indicated times after nuclei and α-32P-dCTP addition to egg extracts. OD for each lane is indicated. Images in all figures show a typical result of experiments repeated at least three times.