| 영문 | nucleic acid | 한글 | 핵산 |
|---|---|---|---|
| 설명 | 염기, 당, 인산으로 이루어진 뉴클레오티드가 긴 사슬 모양으로 중합된 고분자 물질. 유전이나 단백질 합성을 지배하는 중요한 물질로, 생물의 증식을 비롯한 생명 활동 유지에 중요한 작용을 한다. 구성 당인 오탄당이 리보오스인 리보핵산과 디옥시리보오스인 디옥시리보 핵산으로 나뉜다. 펜토스로서 리보스나 데옥시리보스 어느 한쪽만을 포함하며 전자를 리보핵산(RNA), 후자를 데옥시리보핵산(deoxyribonucleic acid, DNA)이라 부른다. 모두 4종류의 유기염기에 의해 특징지어지며 아데닌, 구아닌 및 시토신은 양자에 공통이다. 티민은 DNA에, 우라실은 RNA에 포함된다. DNA는 주로 핵에 존재하며 형질유전에 그리고 RNA는 세포질속에서 단백질 합성에 관여한다. 섭취된 핵산은 소화관에서 구성분자로까지 가수분해되어 흡수된다. |
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| receptors, amino acid | Cell surface proteins that bind amino acids and trigger changes which influence the behaviour of cells. Glutamate receptors are the most common receptors for fast excitatory synaptic transmission in the vertebrate central nervous system, and gaba and glycine receptors are the most common receptors for fast inhibition. (12 Dec 1998) |
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| glucogenic amino acid | <biochemistry> A type of amino acid with carbon chains that can be broken down into an intermediate of the citric acid cycle such as glycogen and then converted into glucose as a means of entering the normal process of carbohydrate metabolism in the body. Examples include: Glycine, alanine, arginine, and ornithine. (14 Oct 1997) |
| RNA, transfer, amino acid-specific | A group of transfer rnas which are specific for carrying each one of the 20 amino acids to the ribosome in preparation for protein synthesis. (12 Dec 1998) |
| polar amino acid | An alpha-amino acid in which the functional group attached to the alpha-carbon (i.e., R in RCH(NH2)COOH) has hydrophilic properties; e.g., serine, cysteine, homocysteine. (05 Mar 2000) |
| sequence homology, amino acid | The degree of similarity between sequences of amino acids. This information is useful for the understanding of genetic relatedness of certain species. (12 Dec 1998) |
| N-(5-amino-1-ribosyl-4-imidazolylcarbonyl)-L-aspartic acid 5'-phosphate synthetase | <enzyme> 5-amino-1-ribosyl-4-imidazole carboxylic acid 5'-phosphate (carboxy-air), ATP and aspartate yield n(5-amino-4-imidazolylcarbonyl)-l-aspartic acid 5'-phosphate(succino-aicar), ADP and p Registry number: EC 6.3.4.- (26 Jun 1999) |
| N(6)-(6-carbamoylhexyl)-FAD-D-amino acid oxidase | <enzyme> A semi-synthetic oxidase; prepared by reacting the succinimido ester of n(6)-(6-carboxyhexyl)-fad with apo-d-amino acid oxidase from pig kidney in the presence of the benzoate Registry number: EC 1.4.3.- Synonym: nch-fad-daao (26 Jun 1999) |
| N-carbamoyl-D-amino acid amidohydrolase | <enzyme> From comamonas sp.e222c; mw 120 kD; hydrolyzes d-enantiomers of various n-carbamoyl-d-amino acids to d-amino acids, ammonia and co2; sensitive to thiol reagents; does not require metal ions Registry number: EC 3.5.1.- Synonym: caa-amidohydrolase, carbamoyl d-aa amidohyrolase (26 Jun 1999) |
| nonessential amino acid | <biochemistry> The amino acid's that can be synthesised by an organism and are thus not required in the diet. (05 Mar 2000) |
| nonpolar amino acid | An alpha-amino acid in which the functional group attached to the alpha-carbon (i.e., R in RCH(NH2)COOH) has hydrophobic properties; e.g., valine, leucine, alpha-aminobutyrate. (05 Mar 2000) |
| D-amino acid malonyltransferase | <enzyme> From mung beans Registry number: EC 2.3.1.- Synonym: 1-aminocyclopropanecarboxylate malonyltransferase, d-acc-malonyltransferase, acc n-malonyltransferase (26 Jun 1999) |
| d-amino-acid oxidase | <enzyme> Chemical name: D-Amino-acid:oxygen oxidoreductase (deaminating) Registry number: EC 1.4.3.3 (12 Dec 1998) |
| D-amino acid transaminase | <enzyme> Catalyses the alpha,beta elimination of the (d)-isomer of beta-chloroalanine or other amino acids to yield pyruvate, chloride and ammonia Registry number: EC 2.6.1.- (26 Jun 1999) |
| D-amino acid transferase | <enzyme> Mw 41 kD; catalyses d-amino acid transfer; d-configuration specific; recognises aromatic d-amino acid esters to form oligo d-amino acid esters Registry number: EC 2.3.2.- (26 Jun 1999) |
| dibasic amino acid | An amino acid containing a second basic group (usually an amino group); e.g., lysine, arginine, ornithine. Synonym: dibasic amino acid. (05 Mar 2000) |