1939 M. Stephenson Bacterial Metabolism (ed. 2) iv. 80 Under the influence of the enzymes in yeast-juice and extracts of dried yeast..A.T.P. can be dephosphorylated in two ways.

1953 Sci. Amer. Sept. 102/2 ATP delivers a phosphate to an amino acid, thereby creating an amino acid acylphosphate.

1956 W. F. H. M. Mommaerts in O. H. Gaebler Enzymes xiv. 319 The system consists..of a hydrolyzing enzyme (actomyosin), a common substrate (ATP), a resynthesizing enzyme (pyruvate kinase), and a reservoir substrate (phosphoenol pyruvate or PEP).

1964 W. G. Smith Allergy & Tissue Metabolism viii. 86 The energy can be released from ATP by its reconversion to ADP and inorganic phosphate.

1976 Ann. Rev. Microbiol. 30 6 We were able to isolate from the frog eggs several milligrams of ATP.

1983 D. J. Weatherall et al. Oxf. Textbk. Med. II. xiii. 7/1 Energy in the form of ATP is used to maintain the integrity of cell structures, to fuel the pumps for maintenance of ionic gradients, and to bring about muscle shortening.

1946 Jrnl. Biol. Chem. 163 340 We conclude that the ATPase is contained only in a fraction of the myosin.

1975 Sci. Amer. Dec. 35/1 We had been working with normal E. coli bacteria, and we decided..to try certain mutant strains that lack the enzyme ATPase.

1982 J. F. Van Pilsum in T. M. Devlin Textbk. Biochem. xxi. 1007 The sliding filament model of muscle contraction involves the ATPase activity of the globular portion of the myosin molecule.

1984 J. F. Lamb et al. Essent. Physiol. (ed. 2) i. 23 The current view of this pump is that it is a large phospholipid molecule in the surface membrane of the cell, which has ATPase (ability to split ATP) properties.

1971 Dept. Transportation & Related Agencies Appropriations 1972 (U.S. House of Representatives 92nd Congr. 1st Sess.) ii. 68 Safety is provided for the automatic train protection (ATP) subsystem by using the train, its wheels and axles and the rail it rides on as a detection circuit.

1989 E. Lamma & P. Mello in G. B. Guy Reliability on Move 79 In practice an ATP system implements a set of constraints that the National Railway Authority imposes on traffic within a station.

2001 Mod. Railways Aug. 31/1 ATP is a system designed to prevent certain types of accident, namely those associated with signals being passed at danger (SPAD).