polyacrylamide gel electrophoresis of the perfusates showed that proteins with molecular weights of 19,000 ( all rats studied ) , and 22,000 , 30,000 and 60,000 ( at least half the rats studied ) were secreted into the perfusion fluids as well as some blood proteins , but the pattern of secretion was not affected by the composition of the perfusion fluid .
C0033684
proteins
C0005832
blood proteins