passages.id: split_1_test_3256_passage
passages.type: progene_text
passages.text: 3-OST-1 binds with micomolar affinity to HS ( K(D) = 2.79 microM ) , and this interaction is apparently independent of the presence of the coenzyme , 3'-phosphoadenosine 5 '-phosphosulfate ( PAPS ) .