passages.id: split_1_test_2836_passage
passages.type: progene_text
passages.text: It is a membrane bound heterodimer ( 150 kDa ) composed of two subunits ArrA ( 110 kDa ) and ArrB ( 34 kDa ) , with an apparent K(m) for arsenate of 34 microM and V(max) of 2.5 micromol min(-1) mg(-1) .