| histic epipedon | An 8- to 16-inch soil layer at or near the surface that is saturated for 30 consecutive days or more during the growing season in most years and contains a minimum of 20 percent organic matter when no clay is present or a minimum of 30 percent organic matter when 60 percent or more clay is present, generally a thin horizon of peat or muck if the soil has not been plowed. (09 Oct 1997) |
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| histidase | <enzyme> An enzyme of the lyase class that catalyses the reaction of l-histidine to form urocanate and ammonia. The reaction is the initial step of histidine catabolism. Genetic deficiency of the enzyme, transmitted as an autosomal recessive trait, causes histidinaemia. Chemical name: L-Histidine ammonia-lyase Registry number: EC 4.3.1.3 (12 Dec 1998) |
| histidinaemia | <biochemistry> A medical condition in which the amount of the amino acid histidine in the blood is abnormally high.Also, histidine is present in the urine and the amount of the enzyme histidase (which breaks down histidine) is abnormally low. Mild retardation and speech or reading disorders often occur along with histidinaemia. (11 Jan 1998) |
| histidinal | The aldehyde analogue of histidine (-CHO replacing -COOH). (05 Mar 2000) |
| histidinase | <enzyme> An enzyme of the lyase class that catalyses the reaction of l-histidine to form urocanate and ammonia. The reaction is the initial step of histidine catabolism. Genetic deficiency of the enzyme, transmitted as an autosomal recessive trait, causes histidinaemia. Chemical name: L-Histidine ammonia-lyase Registry number: EC 4.3.1.3 (12 Dec 1998) |
| histidine | <amino acid> An amino acid with an imidazole side chain with a pKa of 6-7. Acts as a proton donor or acceptor and has high potential reactivity and diversity of chemical function. Forms part of the catalytic site of many enzymes. (18 Nov 1997) |
| histidine ammonia-lyase | <enzyme> An enzyme of the lyase class that catalyses the reaction of l-histidine to form urocanate and ammonia. The reaction is the initial step of histidine catabolism. Genetic deficiency of the enzyme, transmitted as an autosomal recessive trait, causes histidinaemia. Chemical name: L-Histidine ammonia-lyase Registry number: EC 4.3.1.3 (12 Dec 1998) |
| histidine deaminase | <enzyme> An enzyme of the lyase class that catalyses the reaction of l-histidine to form urocanate and ammonia. The reaction is the initial step of histidine catabolism. Genetic deficiency of the enzyme, transmitted as an autosomal recessive trait, causes histidinaemia. Chemical name: L-Histidine ammonia-lyase Registry number: EC 4.3.1.3 (12 Dec 1998) |
| histidine decarboxylase | <enzyme> An enzyme that catalyses the decarboxylation of histidine to histamine and carbon dioxide. It requires pyridoxal phosphate in animal tissues, but not in microorganisms. Chemical name: L-Histidine carboxy-lyase Registry number: EC 4.1.1.22 (12 Dec 1998) |
| histidine N-acetyltransferase | <enzyme> Synthesises nalpha-acetyl-l-histidine from l-histidine and acetylcoenzyme a Registry number: EC 2.3.1.33 Synonym: acetyl-CoA - l-histidine n-acetyltransferase, histidine acetyltransferase, coasac - l-histidine n-acetyltransferase, n-acetylhistidine synthetase (26 Jun 1999) |
| histidine permease | <chemical> Hisp, hism and hisq are membrane proteins found in histidine permease (the hisqmp2 complex); also contains the histidine-binding protein hisj Chemical name: permease, histidine Synonym: hisp protein, hism protein, hisq protein, hutm gene product, ee57d gene product (26 Jun 1999) |
| histidine-trna ligase | <enzyme> An enzyme that activates histidine with its specific transfer RNA. Chemical name: L-Histidine:tRNA(His) ligase (AMP-forming) Registry number: EC 6.1.1.21 (12 Dec 1998) |
| histidino | The radical of histidine produced by removal of a hydrogen from a nitrogen atom; prefixed by Na, Nτ, or Nπ. (05 Mar 2000) |
| histidinol | <chemical> Beta-amino-1h-imidazole-4-propanol. The penultimate step in the pathway of histidine biosynthesis. Oxidation of the alcohol group on the side chain gives the acid group forming histidine. Histidinol has also been used as an inhibitor of protein synthesis. Chemical name: 1H-Imidazole-4-propanol, beta-amino- (12 Dec 1998) |
| histidinol-phosphatase | <enzyme> An enzyme that catalyses the hydrolysis of histidinol-phosphate to histidinol. One of the regulatory enzymes in histidine biosynthesis. Chemical name: L-Histidinol-phosphate phosphohydrolase Registry number: EC 3.1.3.15 (12 Dec 1998) |
Synonyms : Histidinolphosphatase
Synonyms : Histiocyte
Synonyms : Disorder, Malignant Histiocytic, Disorders, Malignant Histiocytic, Histiocytic Disorder, Malignant, Malignant Histiocytic Disorder, Malignant Histiocytic Disorders
Synonyms : Kikuchi's Disease, Kikuchi-Fujimoto Disease, Disease, Kikuchi, Disease, Kikuchi's, Disease, Kikuchi-Fujimoto, Kikuchi Fujimoto Disease, Kikuchis Disease, Necrotizing Lymphadenitis, Histiocytic
Synonyms : Histiocytomas
| histiocytic medullary reticulosis |
a fatal hereditary disorder transmitted as an autosomal recessive trait, characterized by anemia, granulocytopenia, thrombocytopenia, intense phagocytosis of red blood cells, diffuse proliferation of histiocytes of various organs, and enlargement of the liver, spleen, and lymph nodes. Called also familial hemophagocytic r., familial histiocytic r., and Omenn's syndrome.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| histidine |
Histidine is one of the 20 most common natural amino acids, coded for in DNA. Nutritionally, in humans, histidine is considered an essential amino acid, but mostly only in children. The imidazole side chains of histidine and the relatively neutral pK (ca 6.0) mean that relatively small shifts in cellular pH will change its charge. ...
출처: en.wikipedia.org/wiki/Histidine
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| histocompatibility |
Histocompatibility is the property of having the same, or mostly the same, alleles of a set of genes called the major histocompatibility complex. These genes are expressed in most tissues as antigens, to which the immune system makes antibodies. The immune system at first makes antibodies to all sorts of antigens, including those it has never been exposed to, but stops making them to antigens present in the body. ...
출처: en.wikipedia.org/wiki/Histocompatibility
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| histogenesis |
Histogenesis[ h?tō j?nəssiss ] is the formation of tissues and organs from undifferentiated cells. The cells form organs during the fetal phase (9th week to birth) of pregnancy. The layers of cells that form these organs are formally called the Primary Germ Layers, or PGL. The innermost layer is termed the endoderm which may form the lungs, kidneys, and most of the glands in the human body. ...
출처: en.wikipedia.org/wiki/Histogenesis
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| hist- |
History is a term for information about the past. When used as the name of a field of study, history refers to the study and interpretation of the record of human societies. The term history comes from the Greek "ιστορία" historia, "an account of one's inquiries," and shares that etymology with the English word story. ...
출처: en.wikipedia.org/wiki/Hist
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| HIS | belonging to the past |
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| HIS | of what is important or famous in the past |
| HIS | an era of history having some distinctive feature |
| HIS | a stage in the history of a culture having a definable place in space and time |
| HIS | belonging to the past |
| HIS | having once lived or existed or taken place in the real world as distinct from being legendary |
| HIS | used of the study of a phenomenon (especially language) as it changes through time |
| HIS | of or relating to the study of history |
| HIS | of what is important or famous in the past |
| HIS | writing having historical value (as opposed to fiction or myth etc.) |
| HIS | the study of linguistic change |
| HIS | writing having historical value (as opposed to fiction or myth etc.) |