cellular fractionation and percoll gradient centrifugation combined with immunoblotting show that p67 cofractionates with nuclei and is enriched in resistant structure that is insoluble in 2 m nacl , 25 mm lithium 3,5'-diiodosalicylate , and 1 % triton but is soluble in 8 m urea .
C0007634
cellular
C0007610
nuclei