| ELT | endless loop tachycardia; euglobulin lysis time |
|---|---|
| FVL | femoral vein ligation; flow volume loop; force, velocity, length |
| HLH | helix-loop-helix; hemophagocytic lymphohistiocytosis |
| LEEP | left end-expiratory pressure; loop electrosurgical excision procedure |
| LLETZ | large loop excision of the transformation zone |
| helix loop helix | <molecular biology> A motif associated with transcription factors, allowing them to recognise and bind to specific DNA sequences. Two _ helices are separated by a loop. Examples: myoblast MyoD1, c myc, Drosophila genes daughterless, hairy, twist, scute, achaete, asense. Not the same as helix turn helix. (18 Nov 1997) |
|---|---|
| helix-loop-helix motifs | A group of 20-residue peptides characterised by two alpha helices separated by a non-helical segment. These recurring supersecondary structural patterns are found in many sequence-specific DNA-binding proteins. (12 Dec 1998) |
| Henle's loop | The U-shaped part of the nephron extending from the proximal to the distal convoluted tubules, consisting of descending and ascending limbs, located in the medulla renalis and medullary ray. Synonym: Henle's ansa, Henle's loop. (05 Mar 2000) |
| sentinel loop sign | In gastrointestinal radiology, dilatation of a segment of large or small intestine, indicative of localised ileus from nearby inflammation. (05 Mar 2000) |
| Hyrtl's loop | A communicating loop between the right and left hypoglossal nerves, lying between the geniohyoid and genioglossus muscles or in the substance of the geniohyoid; it is found in about one in ten persons. Synonym: Hyrtl's anastomosis. (05 Mar 2000) |
| stem and loop structure | <molecular biology> The structure of tRNAs is so termed because it has four base paired stems and three loops (not base paired), one of which contains the anticodon. (18 Nov 1997) |
| nephronic loop | The U-shaped part of the nephron extending from the proximal to the distal convoluted tubules, consisting of descending and ascending limbs, located in the medulla renalis and medullary ray. Synonym: Henle's ansa, Henle's loop. (05 Mar 2000) |
| subclavian loop | A nerve cord connecting the middle cervical and stellate sympathetic ganglia, forming a loop around the subclavian artery. Synonym: subclavian loop, Vieussens' ansa, Vieussens' loop. (05 Mar 2000) |
| displacement loop | <molecular biology> A structure that can sometimes be seen on DNA which forms when a small area of the double-stranded molecule comes apart and becomes two single strands. The result is a structure shaped like the letter D. Single-stranded binding proteins are usually present to hold the strands apart for the purpose of DNA replication. (09 Oct 1997) |
| d loop | <molecular biology> A structure that can sometimes be seen on DNA which forms when a small area of the double-stranded molecule comes apart and becomes two single strands. The result is a structure shaped like the letter D. Single-stranded binding proteins are usually present to hold the strands apart for the purpose of DNA replication. (09 Oct 1997) |
| double loop hernia | The presence of two loops of intestine in a hernial sac. Synonym: double loop hernia. (05 Mar 2000) |
| Ivy loop wiring | Placement of a wire around two adjacent teeth to provide an attachment for intermaxillary elastics. (05 Mar 2000) |
| T loop of RNA | <molecular biology> The T loop of tRNA is the region of the molecule that is responsible for ribosome recognition. (16 Dec 1997) |
| Tphi CG loop | <molecular biology> The T loop of tRNA is the region of the molecule that is responsible for ribosome recognition. (16 Dec 1997) |
| lenticular loop | The pallidal efferent fibres curving around the medial border of the internal capsule. Synonym: ansa lenticularis, lenticular ansa. (05 Mar 2000) |