Dictionary

dehydrase en · NOUN

Pronunciation

• dēhīʹdrāz (Received-Pronunciation)
• /diːˈhaɪdɹeɪz/ (Received-Pronunciation)
• dēhīʹdrās (Received-Pronunciation)
• /diːˈhaɪdɹeɪs/ (Received-Pronunciation)

Etymology

Formed as de- + hydr- + -ase, by analogy with the German Dehydrase.

Meanings

1. dehydrogenase
   • Citric acid dehydrase is present in the liver and in vegetable material acting on citric acid. 1939, Sir Thomas Edward Thorpe, A Dictionary of Applied Chemistry [4th ed.], volume 3, page 553, column 2
   • It is shown by means of a typical dehydrase, Schardinger’s milk enzyme, that oxidase, reductase and mutase are 1 and the same enzyme. 1914, Chemical Abstracts, volume 8, page 3,051:
   • Freudenberg also postulates a second process whereby catechins in the presence of dehydrases undergo condensation by dehydrogenation. 1959, N. Campbell [contrib.] and Ernest Harry Rodd [ed.], Chemistry of Carbon Compounds, volume 4B, chapter 8, page 942
2. dehydratase
   • The enzymic dehydration of tartaric acid to oxaloacetic acid, first established…for the d-isomer, occurs also with the meso- and l-isomers, and the attack on all three tartaric acids by bacteria of the genus Pseudomonas appears to occur principally by means of stereospecific dehydrases. 1957, Journal of General Microbiology, volume 16, page 480:
   • The usual English term ‘dehydrase’ for an enzyme dehydrating a substrate was changed to dehydratase, because Dehydrase in German…means a dehydrogenating enzyme rather than an enzyme splitting off water. 1953, Advances in Enzymology, volume 14, page 243:

Forms