| PBM | peak bone mass; peripheral basement membrane; peripheral blood mononuclear [cell]; placental basemen... |
|---|---|
| PHM | peptide histidine methionine; peptidylglycine alpha-hydroxylating monooxygenase; posterior hyaloid m... |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |
| SM | Master of Science; sadomasochism; self-monitoring; silicon microphysiometer; simple mastectomy; skim... |
| TBM | total body mass; tracheobronchiomegaly; trophoblastic basement membrane; tuberculous meningitis; tub... |
| Ghon's complex | Calcification seen in pulmonary parenchyma (usually mid-lung area) and hilar nodes resulting from earlier, usually childhood, infection with tuberculosis. Synonym: Ghon's complex, Ghon's focus, Ghon's primary lesion. (05 Mar 2000) |
|---|---|
| castration complex | A child's fear of injury to the genitals by the parent of the same sex as punishment for unconcious guilt over oedipal feelings, fantasied loss of the penis by a female or fear of its actual loss by a male, unconscious fear of injury from those in authority. Synonym: castration anxiety. (05 Mar 2000) |
| caudal pharyngeal complex | The ultimobranchial body associated with the embryonic fourth and transitory fifth pharyngeal pouches. (05 Mar 2000) |
| vitamin b complex | <chemical> A group of water-soluble substances including thiamine, riboflavin, niacin (nicotinic acid), niacinamide (nicotinamide), the vitamin b6 group (including pyridoxine, pyridoxal, pyridoxamine), biotin, pantothenic acid, folic acid, possibly para-aminobenzoic acid, inositol, vitamin b12, and possibly choline. Chemical name: Vitamin B (12 Dec 1998) |
| central complex | In an enzyme-catalyzed reaction, the structural complex of the enzyme and all of the enzyme's substrates (or the enzyme with all of the enzyme's products) equivalent to the binary complex for a one-substrate enzyme. Compare: binary complex, Michaelis complex. (05 Mar 2000) |
| glycine cleavage complex | A complex of several proteins that catalyze the reversible reaction of glycine with tetrahydrofolate to produce CO2, NH3, and N5,N10-methylenetetrahydrofolate; a deficiency of this enzyme (or one of its subunits) will result in nonketotic hyperglycinaemia. Synonym: glycine synthase. (05 Mar 2000) |
| Golgi complex | <cell biology> Intracellular stack of membrane bounded vesicles in which glycosylation and packaging of secreted proteins takes place. Part of the GERL complex. Synonym: Golgi body, Golgi vesicles, dictyosome (in plants), parabasal body (in flagellate protozoa). (11 Jan 1998) |
| charge transfer complex | A complex between two organic molecules in which an electron from one (the donor) is transferred to the other (the acceptor), becoming generally distributed throughout the latter; subsequent transfer of a hydrogen atom completes the reduction of the acceptor; such complex's are generally highly coloured and may be so observed, a network of hydrogen bridges at the catalytic centre of certain proteases. Synonym: charge transfer system. (05 Mar 2000) |
| periodontitis complex | Vertical resorption of the alveolar process with pockets of uneven depth on adjacent teeth, and with traumatic occlusion as a factor. (05 Mar 2000) |
| ribosome-lamella complex | A cylindrical cytoplasmic inclusion composed of concentrically arranged sheets of membranes alternating with rows of ribosomes; characteristic of the hairy cell in leukaemic reticuloendotheliosis. (05 Mar 2000) |
| persecution complex | A feeling that others have evil designs against one's well-being. (05 Mar 2000) |
| met repressor operator complex | Repressor protein, 104 residues, product of the metJ gene, which regulates methionine biosynthesis in E. Coli. Dimeric molecules bind to adjacent sites 8 base pairs apart on the DNA, sequence recognition is by interaction between antiparallel strands of protein and the major groove of the B form DNA duplex. (18 Nov 1997) |
| Meyenburg's complex | Clusters of small bile ducts occurring in polycystic livers, separate from the portal areas. (05 Mar 2000) |
| Michaelis complex | Binary complex of an enzyme. (05 Mar 2000) |
| monophasic complex | A complex in the electrocardiogram that is entirely negative or entirely positive. (05 Mar 2000) |