Helicase
An enzyme that unwinds double-strand DNA into two single DNA strands.
Read Also:
- Helical CAT scan
Helical computed axial tomography scan (CAT scan or CT scan) is another name for a CT scan, and is also called a spiral CT scan. Until approximately the mid to late 1990’s, CT images were obtained one slice at a time, with the patient table moving step by step through the gantry. Scans obtained using […]
- Helicobacter heilmannii
A bacterium that infects most cats, dogs, and pigs and causes them stomach inflammation (gastritis). H. heilmannii is not usually transmitted from animals to people, but people who have been infected by H. heilmannii are known to have developed gastric and duodenal ulcers. Antibiotics can cure H. heilmannii infections. H. heilmannii is closely related to […]
- Helicobacter pylori
A bacterium that causes stomach inflammation (gastritis) and ulcers in the stomach and duodenum. This bacterium is the most common cause of ulcers worldwide. H. pylori infection may be acquired from contaminated food and water or through person-to-person contact. It is common in people who live in crowded conditions with poor sanitation. This bacterium is […]
- Helix, double
The structure of DNA with the two strands of DNA spiraling about one other. The double helix looks something like an immensely long ladder twisted into a helix, or coil. The sides of the “ladder” are formed by a backbone of sugar and phosphate molecules, and the “rungs” consist of nucleotide bases joined weakly in […]
- HELLP syndrome
A combination of the breakdown of red blood cells (hemolysis; the H in the acronym), elevated liver enzymes (EL), and low platelet count (LP) occurring in pregnancy. HELLP syndrome has been considered to be a complication of preeclampsia and eclampsia (toxemia) of pregnancy, but the syndrome can also occur on its own. Common symptoms include […]