NUCLEOTIDE-SEQUENCE OF THE CENTRAL CODING REGION OF BOVINE ERYTHROTROPIN INSULIN-LIKE GROWTH FACTOR-II CDNA FROM FETAL INTESTINE AND NORTHERN ANALYSIS OF THE MAJOR IGF-II TRANSCRIPTS AT THE TIME OF HEPATIC ERYTHROPOIESIS

1. cDNA for insulin-like growth factor II (IGF II) was synthesized from poly A+-RNA from fetal bovine intestine and amplified. 2. The sequence corresponding to amino acids 6-62 was identical to a published ovine IGF II sequence cDNA with the exception of a single nucleotide change (G to A). 3. Northern blot analysis of intestine, liver, kidney and spleen from bovine fetuses showed multiple IGF II RNA species which are more similar to the human than to the rodent mRNAs. 4. Under the hybridization conditions used, synthesis of antisense strands, as described in embryonic chicken IGF II transcripts, was undetectable.