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The carbonic anhydrases (or carbonate dehydratases) (EC 4.2.1.1) form a family of enzymes that catalyze the interconversion between carbon dioxide and water and the dissociated ions of carbonic acid (i.e. bicarbonate and hydrogen ions). [1] The active site of most carbonic anhydrases contains a zinc ion. They are therefore classified as ...
12351 Ensembl ENSG00000167434 ENSMUSG00000000805 UniProt P22748 Q64444 RefSeq (mRNA) NM_000717 NM_007607 RefSeq (protein) NP_000708 NP_031633 Location (UCSC) Chr 17: 60.15 – 60.17 Mb Chr 11: 84.85 – 84.86 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Carbonic anhydrase 4 is an enzyme that in humans is encoded by the CA4 gene. Function Carbonic anhydrases (CAs) are a large ...
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
Polyanhydrides are a class of biodegradable polymers characterized by anhydride bonds that connect repeat units of the polymer backbone chain. Their main application is in the medical device and pharmaceutical industry. In vivo, polyanhydrides degrade into non-toxic diacid monomers that can be metabolized and eliminated from the body. Owing to ...
The tears are unique among body fluids in that they are exposed to the environment. Much like other body fluids, tear fluid is kept in a tight pH range using the bicarbonate buffer system. [15] The pH of tears shift throughout a waking day, rising "about 0.013 pH units/hour" until a prolonged closed-eye period causes the pH to fall again. [15]
High-energy phosphate bonds are usually pyrophosphate bonds, acid anhydride linkages formed by taking phosphoric acid derivatives and dehydrating them. As a consequence, the hydrolysis of these bonds is exergonic under physiological conditions, releasing Gibbs free energy. [citation needed]
Given the duration of the ceremony – typically more than three hours with all the commercial breaks – it can be a long night at the theater if you’re lucky enough to get an Oscars ticket ...
An acid anhydride is a type of chemical compound derived by the removal of water molecules from an acid. In organic chemistry, organic acid anhydrides contain the functional group −C(=O)−O−C(=O)−. Organic acid anhydrides often form when one equivalent of water is removed from two equivalents of an organic acid in a dehydration reaction.