| 单词 | carboxyl |
| 例句 | We then sent these carbon atoms — from a very metabolically active part of the amino acid called the carboxyl group — through a machine called a mass spectrometer to read their isotope fingerprints. Ever wonder how your body turns food into fuel? We tracked atoms to find out 2023-09-05T04:00:00Z In the first reaction, a carboxyl group is removed from pyruvic acid, releasing carbon dioxide as a gas. Concepts of Biology 2013-04-25T00:00:00Z For glycine, the acid strength of the carboxyl group is about the same as that of acetic acid, CH3CO2H, and the base strength of the amino group is slightly greater than that of ammonia, NH3. Chemistry 2019-02-14T00:00:00Z Some of the important functional groups in biological molecules are shown in Figure 2.29; they include: hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl. Biology for AP Courses 2022-06-09T00:00:00Z The peptide bond is formed between the amino group of one amino acid and the carboxyl group of another amino acid. Miller & Levine Biology 2018-01-01T00:00:00Z Notice that glycerol gives up a hydrogen atom, and the carboxyl groups on the fatty acids each give up a hydroxyl group. Anatomy and Physiology 2013-06-19T00:00:00Z The carboxyl group of one amino acid and the amino group of a second amino acid combine, releasing a water molecule. Concepts of Biology 2013-04-25T00:00:00Z The researchers patterned the graphene with “functional groups”—chemical studs such as carboxyl or amine groups. ‘We need a people’s cryo-EM.’ Scientists hope to bring revolutionary microscope to the masses 2020-01-23T05:00:00Z The carboxyl group of one amino acid and the amino group of the incoming amino acid combine, releasing a molecule of water. Biology for AP Courses 2022-06-09T00:00:00Z All amino acids have the amino and carboxyl groups needed to join them together by covalent peptide bonds. Miller & Levine Biology 2018-01-01T00:00:00Z An amino acid is a molecule composed of an amino group and a carboxyl group, together with a variable side chain. Anatomy and Physiology 2013-06-19T00:00:00Z Fatty acids have a long chain of hydrocarbons to which an acidic carboxyl group is attached, hence the name “fatty acid.” Concepts of Biology 2013-04-25T00:00:00Z An unexpected enzymatic carboxyl group migration leads to an antibiotic precursor. Fine-tuning of a radical-based reaction by radical S-adenosyl-L-methionine tryptophan lyase | Science 2016-03-17T04:00:00Z The carboxyl group of one amino acid is linked to the amino group of the incoming amino acid. Biology for AP Courses 2022-06-09T00:00:00Z In a mouse model of depigmentation, DNA vaccination with a melanocyte antigen and the carboxyl terminus of HSP70i was sufficient to drive autoimmunity. [Research Articles] Mutant HSP70 Reverses Autoimmune Depigmentation in Vitiligo 2013-02-27T19:25:08.233Z These amino acids have an amino group and a carboxyl group in their chemical structures. Anatomy and Physiology 2013-06-19T00:00:00Z Intimately connected with this is the fact that these fibres also exhibit partly basic and partly acid characters, due to the presence of carboxyl and amido groups. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z An unexpected enzymatic carboxyl group migration leads to an antibiotic precursor. Fine-tuning of a radical-based reaction by radical S-adenosyl-L-methionine tryptophan lyase | Science 2016-03-17T04:00:00Z This end is called the N terminal, or the amino terminal, and the other end has a free carboxyl group, also known as the C or carboxyl terminal. Biology for AP Courses 2022-06-09T00:00:00Z When treated with alkalies, they lose their carboxyl groups and become ætioporphyrin. The Chemistry of Plant Life Three fatty acids, long chains of hydrocarbons with a carboxyl group and a methyl group at opposite ends, extend from each of the carbons of the glycerol. Anatomy and Physiology 2013-06-19T00:00:00Z The group of carbon, oxygen, and hydrogen atoms which confers the property of acidity upon an organic compound is a half-molecule of oxalic acid—it is known as the carboxyl group. Coal and What We Get from It Hence the positions occupied by the nitro groups in the two different nitrobrombenzoic acids must be symmetrical with respect to the carboxyl group. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Among the hydrophilic functional groups is the carboxyl group found in amino acids, some amino acid side chains, and the fatty acids that form triglycerides and phospholipids. Biology for AP Courses 2022-06-09T00:00:00Z All the acids naturally present in oils and fats, whether free or combined, are monobasic in character, that is to say, contain only one carboxyl—CO.OH group. The Handbook of Soap Manufacture Glycerol gives up hydrogen atoms from its hydroxyl groups at each bond, and the carboxyl group on each fatty acid chain gives up a hydroxyl group. Anatomy and Physiology 2013-06-19T00:00:00Z It differs from cellulose in containing free carboxyl, CO, groups, while its hydroxyl groups, HO, are much more active in their chemical reactions. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The average value for the carboxyl group is 119.75 calories, i.e. it is equal to the sum of the thermal effects of the aldehyde and carbonyl groups. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Fatty acids have a long chain of hydrocarbons to which a carboxyl group is attached, hence the name “fatty acid.” Biology for AP Courses 2022-06-09T00:00:00Z So also hydrogen would tend to take a position as near as possible to hydroxyl and to carboxyl, while hydroxyl would avoid hydroxyl, and carboxyl would avoid carboxyl. Scientific American Supplement, No. 633, February 18, 1888 Proteins are made up of amino acids, which contain positively charged amino groups and negatively charged carboxyl groups. Anatomy and Physiology 2013-06-19T00:00:00Z The basicity of an organic acid, as above defined, is determined by the number of carboxyl groups present. The Project Gutenberg Encyclopedia Volume 1 of 28 The carboxyl group constitutes another convenient starting-point for the orientation of many types of organic compounds. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A carboxyl group is removed from pyruvic acid, releasing carbon dioxide as a gas. Biology for AP Courses 2022-06-09T00:00:00Z The substance is dissolved directly in sufficient normal alkali to neutralise the carboxyl group and a further 2 molecules of caustic soda for each carbomethoxy group to be eliminated are added. Synthetic Tannins These sequences at the amino end or the carboxyl end of the protein can be thought of as the protein’s “train ticket” to its ultimate destination. Biology for AP Courses 2022-06-09T00:00:00Z In the preceding instances the carboxyl group has been synthesized or introduced into a molecule; we have now to consider syntheses from substances already containing carboxyl groups. The Project Gutenberg Encyclopedia Volume 1 of 28 It further removes a carboxyl group from pyruvate producing carbon dioxide. Biology for AP Courses 2022-06-09T00:00:00Z Peptide bonds form between the amino group of the amino acid attached to the A-site tRNA and the carboxyl group of the amino acid attached to the P-site tRNA. Biology for AP Courses 2022-06-09T00:00:00Z Figure 15.16 A peptide bond links the carboxyl end of one amino acid with the amino end of another, expelling one water molecule. Biology for AP Courses 2022-06-09T00:00:00Z Each amino acid has a central carbon that is linked to an amino group, a carboxyl group, a hydrogen atom, and an R group or side chain. Biology for AP Courses 2022-06-09T00:00:00Z A carboxyl group is removed from pyruvate, releasing a molecule of carbon dioxide into the surrounding medium. Biology for AP Courses 2022-06-09T00:00:00Z |
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