This 10x photo shows a transgenic (Ly6a-GFP) mouse embryo. It was designated an Image of Distinction in the 2012 Nikon Small World Photomicrophotography Competition. Amanda Phillips-Yzaguirre and Dr. Nancy Speck of the University of Pennsylvania Department of Cellular and Molecular Biology/DSRB in Philadelphia, PA, used confocal microscopy to capture the image.

www.nikonsmallworld.com