TSA induces direct TR target genes but blocks the regulation of late T
-response genes in premetamorphic tadpole intestine. Stage 55 tadpoles were treated with T3 (5 nM) and/or TSA (100 nM) for the indicated number of days. Total RNA was extracted from isolated intestine and assayed by PCR for the mRNA levels of indicated genes. IFAPB: intestinal fatty acid binding protein. See for details.