Answer to What is This on the Cover of American Laboratory February

The cover image of the American Laboratory February issue showed a gut stained with Hoechst dye (nuclei), Alexa 488 (tubulin), Cy3 (laminin), and Cy5 (actin). Original magnification 20×. The image was captured by Dr. Kavita Aswani of Lumen Dynamics (Mississauga, Canada) using the X-Cite® XLED1 light source to excite samples with 385-nm, 460-nm, 525-nm, and 635-nm LED modules. Preparation protocol: Chroma Fluor-o-4 slide set #92000.

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