passages.id: 1.0alpha7.train.1250.sent
passages.type: sentence
passages.text: First, gel-shift analysis shows that bacterially expressed  Xvent-1 homeodomain binds to the labelled  BIE fragment in a concentration-dependent manner, with higher protein concentrations leading to the formation of oligomers (Figure  4A).
coreferences.id: 1.0alpha7.train.1250.coref0
coreferences.entity_ids: 1.0alpha7.train.1250.ent0_0
coreferences.id: 1.0alpha7.train.1250.coref1
coreferences.entity_ids: 1.0alpha7.train.1250.ent1_0