passages.id: 1.0alpha7.train.199.sent
passages.type: sentence
passages.text: Deletion experiments suggest that these regions, as well as the C- and N-termini, are vital for forming the proper homotrimeric, native structure essential for the binding of PCNA to its target proteins ( Fukuda et al., 1995; Fein and Stillman, 1992).
coreferences.id: 1.0alpha7.train.199.coref0
coreferences.entity_ids: 1.0alpha7.train.199.ent0_0