“Human Chromosome Trisomy (Down and Sex-Y)”, was the topic of an earlier blog post. That blog post displayed the chromosomes 21 and Y (shown atop here). The two chromosomes are 50 million base pairs (Y-chromosome), and 46 million base pairs (21-chromosome) in DNA length long. At bottom of the chart below is Y-chromosome and 21-chromosome … Continue reading Human Gene Symbol Abbreviations.
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)”.
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 18.104.22.168 Eye Retina.
The “Central Dogma of Molecular Biology” put forth by Nobel laureate Francis Crick in 1953 is: “information flows from nucleic acid into amino acid, and never the reverse”. In the diagram above, 20 amino acids (the cubed sector) are translated from 4 RNA codons (three axis). Cicely Williams in 1935 coined the term “kwashiorkor” for … Continue reading Central Dogma of Molecular Biology