100 Papers You Should Read: Molecular Genetics of Human Color Vision: The Genes Encoding Blue, Green, and Red Pigments

This is the fifth paper in the category, 100 Papers You Should Read (in vision science). This paper in the journal Science by Jeremy Nathans, Darcy Thomas and David Hogness in the genetics of human vision is a landmark paper in our understanding of how color vision works.

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Jumping Spiders Use Image Defocusing For Depth Perception

A study out in today’s Science Magazine by Takashi Nagata, Mitsumasa Koyanagi, Hisao Tsukamoto, Shinjiro Saeki, Kunio Isono, Yoshinori Shichida, Fumio Tokunaga, Michiyo Kinoshita, Kentaro Arikawa and Akihisa Terakita proposes that jumping spiders at least, use image defocusing to provide depth perception.  Jumping spiders (Salticidae) are the largest family of spiders and have perhaps the best visual acuity of the invertebrates.

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Astrocyte pVHL and HIF-α Isoforms Are Required for Embryonic-To-Adult Vascular Transition In The Eye

This paper from Toshihide Kurihara, Peter Westenskow, Tim Krohne, Edith Aguilar, Randy A. Johnson, and Marty Friedlander propose a model for the transition from embryonic to adult circulation in the eye  using a combinatorial gene deletion approach with over expression assays, examining astrocyte-targeted deletion of von Hippel-Lindau tumor suppressor (Vhl), hypoxia-inducible factor-αs (Hif-αs), and VEGF on normal regression of hyaloid vessels which are transient fetal vessels in the eye that can be seen in the second and early third trimester of human pregnancy.  Continue reading “Astrocyte pVHL and HIF-α Isoforms Are Required for Embryonic-To-Adult Vascular Transition In The Eye”