PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25986610-3 2015 We show that SAF-A is phosphorylated on serine 59 in mitosis, that phosphorylation requires polo-like kinase 1 (PLK1) rather than DNA-PKcs, that SAF-A interacts with PLK1 in nocodazole-treated cells, and that serine 59 is dephosphorylated by protein phosphatase 2A (PP2A) in mitosis. Nocodazole 174-184 protein phosphatase 2 phosphatase activator Homo sapiens 266-270