passages.id: split_5_test_2631_passage
passages.type: progene_text
passages.text: Steady - state and transient - kinetic studies were conducted to characterize the overall and partial reactions of the Ca(2+) - transport cycle mediated by the human sarco ( endo ) plasmic reticulum Ca(2+)-ATPase 3 ( SERCA3 ) isoforms : SERCA3a , SERCA3b , and SERCA3c .