| papain |
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noun - A proteolytic enzyme in papaya fruit. May aid in digestion and have other health benefits.
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| pathway |
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noun
- A footpath or other path or track
- (biochemistry) A sequence of biochemical compounds, and the reactions linking them, that describe a process in metabolism or catabolism
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| pectin |
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noun
- A substance extracted from the cell walls of plants, especially of fruits; under acidic conditions it forms a gel. It is often used in processed foods, especially jelly, jellies and jams where it causes thickening (setting).
- Apple is rich in and so is often added to other fruits when making jam so it will set.
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| pepsin |
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noun
- (enzyme) A digestive enzyme that chemically digests, or breaks down, proteins into shorter chains of amino acids.
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| peptide |
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noun - (biochemistry) A class of organic compounds consisting of various numbers of amino acids in which the amine of one is reacted with the carboxylic acid of the next to form an amide bond.
- (biochemistry) the peptide bond itself.
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| peptide bond |
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noun - (chemistry) An amide bond formed between the amino and carboxyl functional groups of separate amino acids
- (biochemistry) The primary linkage of amino acids in proteins
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| peptone |
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noun
- (protein) Any water soluble product, a mixture of polypeptides and amino acids formed by the partial hydrolysis of protein.
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| permease |
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noun - (enzyme) Any of several enzymes that transport membrane proteins.
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| peroxidase |
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noun
- Any of a class of enzymes that act on substrates such as hydrogen peroxide and organic hydroperoxides such as lipid peroxides.
category:Enzymes
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| phenylalanine |
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noun
- (amino acid) An essential amino acid C9H11NO2 found in most animal proteins; it is essential for growth; the inability to metabolize it leads to phenylketonuria; it is a constituent of aspartame.
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| phosphatase |
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noun
- (enzyme) Any of several enzymes that hydrolyze phosphate esters, and are important in the metabolism of carbohydrates, nucleotides and phospholipids, and in the formation of bone.
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| phosphatide |
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noun - (chemistry) a phospholipid
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| phospholipase |
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noun
- (enzyme) Any of several enzymes that hydrolyze the phosphate ester bonds of phospholipids.
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| phosphoprotein |
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noun
- (protein) Any protein containing bound phosphate.
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| photophosphorylation |
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noun - (biochemistry) photosynthetic phosphorylation
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| photoreactivation |
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noun
- The reactivation of something by light
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| photosynthate |
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noun - (biochemistry) Any compound that is a product of photosynthesis
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| photosynthesis |
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noun
- (biology) The process by which plants and other autotrophs generate carbohydrates and oxygen from carbon dioxide, water, and light energy in chloroplasts.
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| phytosterol |
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noun
- (context, steroid, botany) A group of steroid alcohols, phytochemicals naturally occurring in plants. They are white powders with mild, characteristic odor, insoluble in water and soluble in alcohols.
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| plastoquinone |
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noun - (biochemistry) a quinone, related to the carotenoids, involved in the electron transport process of photosynthesis
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| polymerase |
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noun
- (enzyme) Any of various enzymes that catalyze the formation of polymers of DNA or RNA using an existing strand of DNA or RNA as a template.
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| polynucleotide |
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noun - (biochemistry) A polymeric macromolecule composed of many nucleotides; examples include DNA and RNA
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| polypeptide |
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noun
- (protein) A small protein containing up to 100 amino acids.
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| porphyrin |
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noun
- (chemistry) A class of heterocyclic compounds containing four pyrrole rings arranged in a square; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium etc).
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| positive |
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noun
- A thing capable of being affirmed; something real or actual.
- A favourable point or characteristic.
- Something having a value in physics, such as an electric charge.
- (grammar) An adjective or adverb in the degree.
- (context, photography) A image; one that displays true colors and shades, as opposed to a negative.
adjective
- Definitively laid down; explicitly stated; clearly expressed, precise, emphatic.
- Bacon:
- : Positive words, that he would not bear arms against King Edward"s son.
- Fully assured, confident; certain.
- I"m absolutely you've spelt that wrong.
- Overconfident, dogmatic.
- Pope:
- : Some , persisting fops we know, That, if once wrong, will needs be always so.
- (grammar) Describing the primary sense of an adjective or adverb; not comparative or superlative.
- "Better" is an irregular comparative of the form "good".
- Derived from an object by itself; not dependent on changing circumstances or relations; absolute.
- The idea of beauty is not , but depends on the different tastes of individuals.
- Wholly what is expressed; colloquially downright, entire, outright.
- Good lord, you've built up a arsenal of weaponry here.
- Characterised by the existence or presence of qualities or features, rather than by their absence.
- The box was not empty " I felt some substance within it.
- Characterised by the presence of features which support a hypothesis.
- The results of our experiment are .
- Characterised by affirmation, constructiveness, or influence for the better; favourable.
- He has a outlook on life.
- The first-night reviews were largely .
- Swift:
- : a voice in legislation.
- (context, chiefly, philosophy) actual, Actual, real, concrete.
- Bacon:
- : Positive good.
- (photography) Of a visual image, true to the original in light, shade and colour values.
- A photograph can be developed from a photographic negative.
- (physics) Having more protons than electrons.
- A cation is a positive ion as it has more protons than electrons.
- (slang) HIV positive.
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| progesterone |
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noun
- (steroid hormone) A steroid hormone, secreted by the ovaries, whose function is to prepare the uterus for the implantation of a fertilized ovum and to maintain pregnancy.
- (steroid drug) A synthetic version of the compound, used in contraceptive pills and other pharmaceutical products.
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| proline |
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noun
- (amino acid) A nonessential amino acid C5H9NO2 found in most animal proteins, especially collagen; its cyclic structure leads to kinks in the peptide chain of proteins.
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| prostaglandin |
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noun - (biochemistry) Any of a group of naturally occurring lipids derived from the C20 acid prostanoic acid; they have a number of physiological functions and may be considered to be hormones.
- 2001: This enzyme generates an inflammatory mediator known as , which triggers pain and other aspects of inflammation. " Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 51)
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| protamine |
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noun - (biochemistry) any of a class of proteins, rich in arginine, found in the sperm of fish; used medicinally to control the action of insulin
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| protease |
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noun
- (enzyme) An enzyme that cuts or cleaves proteins.
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| protein |
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noun
- (context, nutrition) One of three major classes of food or source of food energy (4 kcal/gram) abundant in animal-derived foods (ie: meat) and some vegetables, such as legumes. see carbohydrate and fat for the other two major classes
- (biochemistry) A large, complex molecule composed of long chains of amino acids linked by a peptide bond
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| proteolysis |
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noun
- (biochemistry) The hydrolysis of proteins into peptides and amino acids; especially as part of the digestion of food.
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| PTC |
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initialism - Positive temperature coefficient device. (electronics)
- Pre-Trial Conference
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| pyranose |
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noun - (chemistry) any cyclic hemiacetal form of a monosaccharide having a six-membered ring (based on tetrahydropyran)
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| pyrimidine |
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noun - (chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and two nitrogen atoms; especially the simplest one, C4H4N2, and three of the bases found in DNA and RNA, thymine, uracil and cytosine .
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