serum obtained at or near peak peg-cic levels was precipitated by 3.75 % peg 6000 and fractionated by column chromatography on sephadex g-200 ( exclusion limit , greater than 600,000 mol wt ) in glycine-hcl and 1 m nacl buffer at ph 2.8 .
C0032483
peg
C0982348
75