32 results found

Search Results for: tyrosine

Phosphorylation

Phosphorylation Definition We can define phosphorylation as a biochemical process in which a phosphate molecule is added to... Read More

Tyrosine

tyrosine (Science: amino acid) One of the twenty amino acids directly coded in proteins. Nonessential in humans since can be... Read More

Millons test

Definition noun A color reaction test using Millon's reagent to detect phenolic compounds (e.g. tyrosine) Supplement French... Read More

Melanogenesis

Definition noun The process of producing melanin Supplement Melanogenesis is the process of melanin production. Melanocytes... Read More

Dopamine

Definition noun, plural: dopamines 3,4-dihydroxyphenethylamine (chemical formula: C8H11NO2); a neurotransmitter or a hormone... Read More

Autocrine signaling

Autocrine Signaling Definition What is autocrine signaling? Autocrine signaling is a type of cell signaling wherein a cell... Read More

Amelanism

Definition noun A condition characterized by the complete lack of pigments (or melanin) Supplement Melanin is a compound... Read More

Eumelanin

Definition noun An aggregate of pigment molecules, each made up of cross-linked 5,6-dihydroxyindole (DHI) and... Read More

Phenylalanine

phenylalanine (Science: amino acid) One of the amino acids which the body cannot manufacture itself, but must acquire from... Read More

Neuromelanin

Definition noun A type of melanin pigment present in parts of the brain, particularly in the neurons of substantia nigra and... Read More

Albino

Definition noun, plural: albaninos An organism with albinism, which is a condition characterized mainly by a lack of or an... Read More

Pheomelanin

Definition noun A type of melanin pigment that is made up of benzothiazine units and is responsible for yellow and pink to... Read More

Melanin

Definition noun A group of insoluble pigments found in melanophores and produced from the oxidation of tyrosine, followed by... Read More

Principles of Hormonal Control Systems

Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More

Millons reagent

Definition noun A reagent for use in Millon reaction test for detecting the presence of tyrosine and other phenolic... Read More

Autophosphorylation

Definition noun (biochemistry) The phosphorylation of the kinase through its own enzymatic... Read More

Genetic Control – On and Off Genes

Reviewed by: Mary Anne Clark, Ph.D. This lesson looks at the various factors involved that affect growth and... Read More

photobiology

Photobiology Definition Photobiology, the biology of light, is a subdiscipline in biology. It focuses on the effects of... Read More

Sh domains

SH domains (Science: molecular biology) src homology domains: domains of protein that, from their homology with src are... Read More

Thyroxine

Definition noun, plural: thyroxines An iodine-containing hormone (chemical formula: C15H11I4NO4) produced by the thyroid... Read More

Fes

Fes (Science: oncogene) An oncogene, identified in avian and feline sarcomas, encoding a tyrosine protein... Read More

Albinism

Definition noun A hereditary, congenital disorder characterized by the complete or partial lack of pigmentation production... Read More

Coenzyme

Enzymes can break down complicated large molecules into simpler smaller ones, they can combine small molecules or atoms to... Read More

Morners test

Morner's test For cysteine, which gives a brilliant purple colour with sodium nitroprusside; for tyrosine, which gives a... Read More

Fumarate

Fumarate (Science: biochemistry) a dicarboxylic acid intermediate in the tricarboxylic acid cycle. Can be derived from... Read More

Phenolase

Definition noun An oxidoreductase enzyme that catalyzes the oxidation of phenols and other related... Read More

Glycosylation

Definition noun A biochemical process where a glycan attaches to a protein, a lipid, or other organic molecule, especially... Read More

Polysaccharide

Reviewed by: Todd Smith, PhD Polysaccharide Definition noun plural: polysaccharides pol·y·sac·cha·ride,... Read More

Amino acid

Definition noun, plural: amino acids (1) A molecule consisting of the basic amino group (NH2), the acidic carboxylic group... Read More

Polypeptide

Polypeptide Definition Biology What are polypeptides? A polypeptide is defined as a polymer of amino acids joined together... Read More

Oligosaccharide

Definition noun plural: oligosaccharides ol·i·go·sac·cha·ride, ˌɒlɪɡəʊˈsækəɹaɪd (biochemistry) A... Read More

Genetic Mutations

Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More