A hand cross-section of transgenic rice stem histochemically stained for beta-glucuronidase (GUS) reporter activity (blue dye indicates sites with GUS activity). Zeiss Axiophot microscope, 10x/0.3 objective, DXM1200 color CCD camera. Scale bar = 100 micrometers. Sample courtesy Dr. Chandra Emani, IDMB, rice biotechnology group. Sectioning and imaging by Stan Vitha, MIC.