The long 3′‐untranslated regions of the PDGF‐A and ‐B mRNAs are only distantly related

Abstract
A cDNA clone of about 2300 base pairs was prepared from the human osteosarcoma cell line U‐2 OS by hybridization with a 22‐mer oligonucleotide complementary to the NH2‐terminus of PDGF‐A. Restriction and sequence analysis showed that this clone contains the entire coding region for PDGF‐A and a long 3′‐untranslated region which is only distantly related to that in the mRNA of PDGF‐B.