rapid targeting and clearance from blood and normal organs of the antibody fragments ( blood median t1/2 elimination of 26.5 and 13.2 h for the f ( ab ' ) 2 and fab ' fragments respectively ) permitted the use of short-lived radionuclides , such as 123i ( 13.3 h ) and 99mtc ( 6 h ) , and confirmed that selective antibody accretion in tumors occurred very soon after administration , such as between 2 and 5 h .
C0021009
antibody fragments
C0021031
fab