Seen in the Cell Image Library

Stem cells labeled with green fluorescent protein (GFP) located at the base of the colonic crypt in a section of mouse colon. The stem cells are surrounded by numerous goblet cells (red) that secrete mucous. Other cells of the colon are observed using DAPI staining, which highlights the cell nucleus in blue. This image ( by Paul Appleton is published under a Creative Commons Attribution, Noncommercial, No Derivatives License.

The Cell Image Library ( is a freely accessible, easy-to-search, public repository of reviewed and annotated images, videos, and animations of cells. Portions of the Cell Image Library were developed by ASCB under a Grand Opportunities grant from the National Institute of General Medical Sciences and are now managed by the National Center for Microscopy and Imaging Research under a perpetual license from ASCB.

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