Transcription of macrophage IGF-I exon 1 is positively regulated by the 5'-untranslated region and negatively regulated by the 5'-flanking region.
Wynes MW, Riches DW. Transcription of macrophage IGF-I exon 1 is positively regulated by the 5'-untranslated region and negatively regulated by the 5'-flanking region. Am J Physiol Lung Cell Mol Physiol. 2005 Jun; 288(6):L1089-98.