L-arabinose

(noun)

Arabinose is an aldopentose – a monosaccharide containing five carbon atoms, and including an aldehyde (CHO) functional group.

Related Terms

Examples of L-arabinose in the following topics:

  • The AraC Regulator

    • The L-arabinose operon, also called ara operon, encodes enzymes needed for the catabolism of arabinose to xylulose 5-phosphate.
    • The L-arabinose operon, also called ara operon, is a gene sequence encoding enzymes needed for the catabolism of arabinose to xylulose 5-phosphate, an intermediate of the pentose phosphate pathway.
    • When arabinose is present, arabinose binds AraC and prevents it from interacting.
    • When arabinose is present, AraC acts as an activator and it builds a complex: AraC + arabinose.
    • Thus the activation depends on the presence of arabinose and cAMP.

  • Leishmaniasis

    • The species of Leishmania that can cause leishmaniasis include: L. donovani complex with 2 species (L. donovani, L. infantum, also known as L. chagasi); the L. mexicana complex with 3 main species (L. mexicana, L. amazonensis, and L. venezuelensis); L. tropica; L. major; L. aethiopica; and the subgenus Viannia with 4 main species (L.
    • (V.) braziliensis, L.
    • (V.) guyanensis, L.
    • (V.) panamensis, and L.

  • Normal Genitourinary Microbiota

    • It was long thought that the most common of these species was Lactobacillus acidophilus, but it has later been shown that the most common one is L. iners followed by L. crispatus.
    • Other lactobacilli found in the vagina are L. jensenii, L. delbruekii and L. gasseri.

  • Mycoplasmas and Other Cell-Wall-Deficient Bacteria

    • Other bacterial species occasionally mutate or respond to extreme nutritional conditions by forming cells lacking walls, termed L-forms.
    • L-forms have varied shapes and are sensitive to osmotic shock .

  • Attachment and Entry of Herpes Simplex

    • Once bound to the HVEM, gD changes its conformation and interacts with viral glycoproteins H (gH) and L (gL), which form a complex.
    • Afterward, gB interaction with the gH/gL complex creates an entry pore for the viral capsid.

  • Genetics and Regulation of N2 Fixation

    • Some of nif genes are: Nif A, D, L,K, F,H S,U,Y,W,Z .
    • If there is a sufficient amount of reduced nitrogen or oxygen is present, another protein is activated, NifL.
    • In turn, NifL inhibits NifA activity, which results in the inhibition of nitrogenase formation.
    • NifL is then regulated by other proteins that are sensors for the levels of O2 and ammonium in the surrounding environment.

  • HIV and AIDS

    • A CD4 count of less than 500/uL.
    • A CD4 count of less than 200/uL.
    • Stage 1: CD4 count ≥ 500 cells/uL and no AIDS defining conditions
    • Stage 2: CD4 count 200 to 500 cells/uL and no AIDS defining conditions
    • Stage 3: CD4 count ≤ 200 cells/uL or AIDS defining conditions

  • Respiratory Syncytial Virus Infection

    • M2 is the second matrix protein required for viral transcription; it encodes M2-1 (elongation factor) and M2-2 (transcription regulation), while L encodes the RNA polymerase.
    • The phosphoprotein P is a cofactor for L.
    • The genome is transcribed sequentially from NS1 to L with reduction in expression levels along its length.

  • Biosynthesis of Tetrapyrroles

    • H2porphyrin + [MLn]2+ → M(porphyrinate)Ln-4 + 4 L + 2 H+

  • Primary and Secondary Metabolites

    • Additionally, primary metabolites such as amino acids-- including L-glutamate and L-lysine, which are commonly used as supplements-- are isolated via the mass production of a specific bacterial species, Corynebacteria glutamicum.