Medical dictionary
Medical terminology normalized via MeSH, ICD-11, SNOMED CT.
62,341 terms indexed
An enzyme that catalyzes the conversion of an orthophosphoric monoester and water to an alcohol and orthophosphate. EC 3.1.3.1.
Organic nitrogenous bases. Many alkaloids of medical importance occur in the animal and vegetable kingdoms, and some have been synthesized. (Grant and Hackh's Chemical Dictionary, 5th ed)
A pathological condition that removes acid or adds base to the body fluids.
A state due to excess loss of carbon dioxide from the body. (Dorland, 27th ed)
The generic name for the group of aliphatic hydrocarbons Cn-H2n+2. They are denoted by the suffix -ane. (Grant and Hackh's Chemical Dictionary, 5th ed)
Organic esters or salts of sulfonic acid derivatives containing an aliphatic hydrocarbon radical.
Sulfonic acid derivatives that are substituted with an aliphatic hydrocarbon group.
An inborn error of amino acid metabolism resulting from a defect in the enzyme HOMOGENTISATE 1,2-DIOXYGENASE, an enzyme involved in the breakdown of PHENYLALANINE and TYROSINE. It is characterized by accumulation of HOMOGENTISIC ACID in the urine, OCHRONOSIS in various tissues, and ARTHRITIS.
Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant and Hackh's Chemical Dictionary, 5th ed, p408)
A somewhat heterogeneous class of enzymes that catalyze the transfer of alkyl or related groups (excluding methyl groups). EC 2.5.
Highly reactive chemicals that introduce alkyl radicals into biologically active molecules and thereby prevent their proper functioning. Many are used as antineoplastic agents, but most are very toxic, with carcinogenic, mutagenic, teratogenic, and immunosuppressant actions. They have also been used as components in poison gases.
The covalent bonding of an alkyl group to an organic compound. It can occur by a simple addition reaction or by substitution of another functional group.
Organic mercury compounds in which the mercury is attached to an alkyl group.
Hydrocarbons with at least one triple bond in the linear portion, of the general formula Cn-H2n-2.
A urea hydantoin that is found in URINE and PLANTS and is used in dermatological preparations.
An extra-embryonic membranous sac derived from the YOLK SAC of REPTILES; BIRDS; and MAMMALS. It lies between two other extra-embryonic membranes, the AMNION and the CHORION. The allantois serves to store urinary wastes and mediate exchange of gas and nutrients for the developing embryo.
Variant forms of the same gene, occupying the same locus on homologous CHROMOSOMES, and governing the variants in production of the same gene product.
A situation where one member (allele) of a gene pair is lost (LOSS OF HETEROZYGOSITY) or amplified.
The process by which organisms release chemical compounds known as ALLELOCHEMICALS which influence the physiology, growth, survival, colonization, and reproductive activities of other species usually located nearby.
Antigen-type substances that produce immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).
A medical specialty concerned with the hypersensitivity of the individual to foreign substances and protection from the resultant infection or disorder.
A neurological disorder in which a sensory stimulus, usually tactile but more rarely other sensory modalities, is misperceived in a location distant from the original stimulus.
Synthetic analogs of the naturally occurring insecticides cinerin, jasmolin, and pyrethrin. (From Merck Index, 11th ed)