See Also: Thimann, Kenneth V(ivian)(encyclopedia)
phosphoriboisomerase(medicine)
Kenneth I(encyclopedia)
Blackfan, Kenneth(medicine)
Kenneth (as used in expressions)(encyclopedia)
MacMillan, Sir Kenneth(encyclopedia)
Noland, Kenneth(encyclopedia)
Pike, Kenneth L(ee)(encyclopedia)
Rexroth, Kenneth(encyclopedia)
Grahame, Kenneth(dictionary)

Thimann, Kenneth V(ivian) (sh) and phosphoriboisomerase (medicine)


Thimann, Kenneth V(ivian) (sh)




born Aug. 5, 1904, Ashford, Kent, Eng.
died Jan. 15, 1997, Haverford, Pa., U.S.

British-born U.S. plant physiologist.

He received his Ph.D. from Imperial College in London. In 1934 he obtained and isolated pure auxin, an important plant-growth hormone and, with several coworkers, proved that auxin promotes cell elongation, formation of roots, and growth of buds, discoveries that led to the development of a widely used synthetic auxin, 2,4-D. Use of this and similar chemicals can prevent the premature falling of fruit and stimulate cut stems to grow abundant roots; because high concentrations of auxins are toxic to most plants, synthetic auxins are also effective weed killers.


phosphoriboisomerase (medicine)


phosphoriboisomerase -->
ribose-5-phosphate isomerase
<enzyme> An enzyme catalyzing interconversion of d-ribose 5-phosphate and d-ribulose 5-phosphate; of importance in ribose metabolism and in the pentose phosphate pathway.

Synonym: phosphopentose isomerase, phosphoriboisomerase.