“Human Chromosome Trisomy (Down and Sex-Y)”.

   Human Chromosome Slides was the topic of an earlier blog post that is a “PowerPoint” presentation.   Above I show two chromosomes that are often seen in “trisomy” in diploid cells.  Trisomy 21 is commonly called “Down Syndrome”.  The 6th item from the bottom (left side) says “Down syndrome cell adhesion molecule”.   The … Continue reading “Human Chromosome Trisomy (Down and Sex-Y)”.

"Retinal Isomerase", Enzyme Commission 5.2.1.3 Eye Retina.

Oliver Sacks, “The Island of the Colorblind“, 1997 was the topic of an earlier blog post.  The Micronesian isle of Pinggelap  suffers from hereditary achromatopsia (colorblindness) and neurologist Oliver Sacks describes this eye condition.  While “cone cell” blindness is present, the “rod cell” is functional.  In the diagram  above,   I show the visual process … Continue reading "Retinal Isomerase", Enzyme Commission 5.2.1.3 Eye Retina.