Cellular & Molecular Biology, Cellular Structure & Organization
Last Updated: November 1, 2025 Introduction to Structures and Functions of Biological Membranes Biological membranes are composed of lipid, protein, and carbohydrate that exist in a fluid state. Biological membranes are the structures that define and control the...
Diseases and Disorders, Diseases of Amino Acid and Organic Acid Metabolism
Last Updated: October 29, 2025 Introduction to Hartnup Disorder Hartnup disorder is an autosomal recessive disorder that was first described in 1956 in the Hartnup family in London. The originally characterized patients exhibited a renal aminoaciduria of neutral amino...
Diseases and Disorders, Diseases of Amino Acid and Organic Acid Metabolism
Last Updated: November 4, 2025 Introduction to Cystinuria As the name implies, cystinuria is a disorder associated with excess cystine in the urine. Cystine is the oxidized disulfide homodimer of two cysteines. Type I cystinuria is an autosomal recessive disorder that...