PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7935767-4 1994 We show that Rad1 binds specifically to a Holliday junction and, in the presence of magnesium, catalyses the endonucleolytic cleavage of the junction. Magnesium 84-93 ssDNA endodeoxyribonuclease RAD1 Saccharomyces cerevisiae S288C 13-17