(1) inflamed joints; (2) inflammation of the eyes (conjunctivitis); and (3) inflammation of the genital, urinary or gastrointestinal system.
Reactive arthritis is the preferred name for what was called Reiter’s syndrome since it is thought to involve the immune system which is “reacting” to the presence of a bacterial infection in the genital, urinary, or gastrointestinal system. Accordingly, certain people’s immune systems are genetically primed to react aberrantly when these areas are exposed to certain bacteria. The aberrant reaction of the immune system leads to inflammation in the joints, eyes, and genital, urinary or gastrointestinal system.
- Reactive oxygen species
Species such as superoxide, hydrogen peroxide, and hydroxyl radical. At low levels, these species may function in cell signalling processes. At higher levels, these species may damage cellular macromolecules (such as DNA and RNA) and participate in apoptosis (programmed cell death).
- Reading frame
One of the three possible ways to read a nucleotide sequence in DNA, depending on whether reading starts with the first, second, or third base in a triplet.
- Reading frame, open
A portion of DNA that occurs between a start codon and a termination codon which can potentially be translated into a protein Abbreviated ORF.
- Reading retardation
Reading retardation means impaired ability to read. Reading retardation is an impairment that may, for example, reflect mental retardation or cultural deprivation. Reading retardation is different from dyslexia, a specific reading disability due to a defect in the brain’s (higher cortical) processing of graphic symbols; in other words, dyslexia is a learning disability that alters […]
A substance that is used to produce a chemical reaction that allows researchers to detect, measure, produce, or change other substances.