an ifn-alpha 1 cdna insert containing such sequences can be used to isolate 15 ifn-beta 1 cdna colonies present in a 2600-strong library in escherichia coli prepared from polyadenylated rna extracted from human diploid fibroblasts ( fs-4 ) induced with poly ( i ) .poly ( c ) .
C0015980
ifn-beta
C0016030
fibroblasts