passages.id: split_5_test_1618_passage
passages.type: progene_text
passages.text: Autoantibody to the leucine zipper region of 52 kDa Ro / SSA binds native 60 kDa Ro / SSA : identification of a tertiary epitope with components from 60 kDa Ro / SSA and 52 kDa Ro / SSA .