This image shows photoreceptor neurons of the fruit fly Drosophila melanogaster, with the photoreceptors visualized by phalloidin (green). The light-sensitive protein rhodopsin 1 (yellow) is aberrantly localized in the cytoplasm of those photoreceptors that have defective mitochondria (non-blue), while the normal photoreceptors are marked by RFP (blue).  Image credit: Manish Jaiswal

This image shows photoreceptor neurons of the fruit fly Drosophila melanogaster, with the photoreceptors visualized by phalloidin (green). The light-sensitive protein rhodopsin 1 (yellow) is aberrantly localized in the cytoplasm of those photoreceptors that have defective mitochondria (non-blue), while the normal photoreceptors are marked by RFP (blue). Image credit: Manish Jaiswal

Visual System  By W. Ryan Williamson and P. Robin Hiesinger, University of Texas Southwestern Medical Center    The neurons in the eye use guidance cues to connect to specific regions of the brain. This confocal image provides an overview of the adult visual system in Drosophila, showing how different classes of photoreceptors (green) project their axons into distinct regions of the fly brain, either the lamina or the medulla of the optic lobe. Specifically, axon

Visual System By W. Ryan Williamson and P. Robin Hiesinger, University of Texas Southwestern Medical Center The neurons in the eye use guidance cues to connect to specific regions of the brain. This confocal image provides an overview of the adult visual system in Drosophila, showing how different classes of photoreceptors (green) project their axons into distinct regions of the fly brain, either the lamina or the medulla of the optic lobe. Specifically, axon

Part of the central nervous system in a fruit fly (Drosophila melanogaster).

Stunning Photos Reveal Beauty in Medicine

Part of the central nervous system in a fruit fly (Drosophila melanogaster).

A Drosophila melanogaster embryo using in situ hybridization to visualize mRNA expression of the gap gene giant (red) and the pair-rule gene even-skipped (blue), with Sytox Green (Invitrogen) used to localize nuclei. Specimen preparation and imaging by Cecelia Miles, Dr. Martin Kreitman's lab; projection and cover design by Dr. Vytas Bindokas; University of Chicago, USA.

A Drosophila melanogaster embryo using in situ hybridization to visualize mRNA expression of the gap gene giant (red) and the pair-rule gene even-skipped (blue), with Sytox Green (Invitrogen) used to localize nuclei. Specimen preparation and imaging by Cecelia Miles, Dr. Martin Kreitman's lab; projection and cover design by Dr. Vytas Bindokas; University of Chicago, USA.

The image represents fruit fly (Drosophila melanogaster) ommatidia, which are arranged in an extremely regular array in the compound eye. Nu...

The image represents fruit fly (Drosophila melanogaster) ommatidia, which are arranged in an extremely regular array in the compound eye. Nu...

The image shows a conceptualised view of all the DNA sequences on planet Earth. Image credit: David J Hammett.

The image shows a conceptualised view of all the DNA sequences on planet Earth. Image credit: David J Hammett.

Transcription factors control where and when gene expression is switched on by binding to specific stretches of DNA. Here we used the sea squirt Ciona, a simple chordate, and analyzed how the transcription factor Brachyury ensures the appropriate deployment of its target genes at specific times during the sequential steps of notochord formation.

Transcription factors control where and when gene expression is switched on by binding to specific stretches of DNA. Here we used the sea squirt Ciona, a simple chordate, and analyzed how the transcription factor Brachyury ensures the appropriate deployment of its target genes at specific times during the sequential steps of notochord formation.

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