Affinity separation of polyribonucleotide-binding human blood proteins.

Using affinity columns with immobilized poly(A), poly(G), poly(U), poly(C), and poly(A).poly(U) and poly(G) x poly(C) duplexes several polyribonucleotide-binding blood plasma proteins have been captured. Albumin and keratins K1 and K2e have been detected to bind polypurine tracts.