| control group | A group of subjects participating in the same experiment as another group of subjects, but which is not exposed to the variable under investigation. See: experimental group. (05 Mar 2000) |
|---|---|
| polar group | <chemistry> Any chemical grouping in which the distribution of electrons is uneven enabling it to take part in electrostatic interactions. (18 Nov 1997) |
| portage group | <geology> A subdivision of the Chemung period in American geology. See Chart of Geology. Origin: So called from the township of Portage in New York. Source: Websters Dictionary (01 Mar 1998) |
| posterior group of axillary lymph nodes | Node's of the axillary region located along the subscapular vein and its tributaries; they receive afferent vessels from the dorsal surface of the thorax and scapular region, and send efferent vessels to the central group of lymph nodes. Synonym: nodi lymphatici axillares subscapulares, posterior group of axillary lymph nodes. (05 Mar 2000) |
| HACEK group | A group of Gram-negative bacteria that includes Haemophilus spp., Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella kingae. Bacteria in this group have in common a culture requirement of an enhanced carbon dioxide atmosphere and ability to infect human heart valves. (05 Mar 2000) |
| potsdam group | <geology> A subdivision of the Primordial or Cambrian period in American geology; so named from the sandstone of Potsdam, new York. See Chart of Geology. Source: Websters Dictionary (01 Mar 1998) |
| harlech group | <geology> A minor subdivision at the base of the Cambrian system in Wales. Origin: So called from Harlech in Wales. Source: Websters Dictionary (01 Mar 1998) |
| cytophil group | The atom group in the antibody (amboceptor) that binds it to the cell. (05 Mar 2000) |
| cytoplasmic polyhedrosis virus group | <virology> A group of viruses in the family Reoviridae which infects arthropods (like spiders, insects, crustaceans, horseshoe crabs, etc.). (09 Oct 1997) |
| private blood group | A blood group that is known to have occurred in only one family and is traceable to one single person. (05 Mar 2000) |
| sandfly fever group viruses | A group of viruses in the genus phlebovirus of the family bunyaviridae transmitted by the sandfly, phlebotomus papatasii, and causing a short febrile illness in humans. The sandfly fever sicilian virus, the type species of the phlebovirus genus, is not part of this group. (12 Dec 1998) |
| prosthetic group | A tightly bound nonpolypeptide structure required for the activity of an enzyme or other protein, for example the haem of haemoglobin. (18 Nov 1997) |
| high-mobility group protein | <protein> An HMG protein is one of a group of various different proteins which are somehow involved with chromatin, but which are not histones and whose exact function is not known. (09 Oct 1997) |
| high mobility group proteins | Family of small, nonhistone, nuclear proteins. Some appear to be involved in controlling transcription. (18 Nov 1997) |
| histo-blood group B transferase | <enzyme> Catalyses transfer of galactose from udp-galactose to glycoproteins and glycolipids; differs from a transferase by four amino acid residues Registry number: EC 2.4.1.- Synonym: b transferase, histo-blood group (26 Jun 1999) |