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protein Z

SEE: under protein.

proteo-, prote-

[Fr. protéine, protein] Prefixes meaning protein.

proteobacteria

(prō″tē-ō-băk-tē′rē-ă) A diverse phylum of gram-negative bacteria, which includes many intestinal bacteria, e.g., Escherichia coli, Salmonella; the nitrogen-fixing bacteria; and the anaerobic purple bacteria.

proteoglycan

(prō″tē-ŏ-glī′ kan″) [prote(in) + glycan] Any of a family of molecules that are fundamental components of mucus and connective tissues. They are composed of sugars linked to polypeptides and are found in organs and tissues throughout the body.

proteolipid

(prō″tē-ō-lĭp′ĭd) A lipid-protein complex that is insoluble in water. It is found principally in the brain.

proteolysis

(prōt″ē-ol′ĭ-sis) [protein + lysis] The hydrolysis of proteins, usually by enzymes, into shorter peptides. proteolytic (prōt″ē-ŏ-lit′ik), adj. proteolytically (prōt″ēŏ-lit′ĭ-k(ă-)lē), adv.

proteolytic

(prō″tē-ō-lĭt′ĭk) Hastening the hydrolysis of proteins.

proteome

(prō′ tē-ōm″) All of the proteins that can be synthesized from the DNA of an organism.

proteomics

(prō″ tē-ŏm′ ĭks) The study of the proteins synthesized by living organisms and their impact on health and disease.

proteose

(prō′tē-ōs) [Gr. protos, first] One of the class of intermediate products of proteolysis between protein and peptone.

 primary p. The first products formed during proteolysis of proteins.

 secondary p. The protein resulting from further hydrolysis of primary proteoses.

Proteus

(prō′tē-ŭs) [Gr. Proteus, a god who could change his form] A genus of gram-negative, facultatively anaerobic, motile bacilli that inhabits the intestinal tract and causes protein decomposition; it is a cause of human infection, esp. of the kidneys, ureters, and bladder.

 P. mirabilis A species abundant in nature and an occasional human pathogen, e.g., of the urinary tract.

 P. vulgaris An essentially saprophytic species that may produce urinary tract infections.

prothrombin

(prō-throm′bĭn) [pro- + thrombin] Coagulation factor II, a plasma protein coagulation factor synthesized by the liver (vitamin K is necessary) and converted to thrombin by prothrombinase and thrombokinase (activated factor X) in the presence of calcium ions. SEE: blood coagulation; coagulation factor.

prothrombinase

(prō-thrŏm′bĭn-āz) An enzyme important in blood coagulation. In a reaction with activated factors X (Xa) and V (Va) in the presence of calcium and platelets, prothrombinase catalyzes the conversion of prothrombin to thrombin.

prothrombin complex concentrate

ABBR: PCC. Plasma that contains only clotting factors II, IX, X (and low levels of factor VII). ...