title: An inositol 1,4,5-trisphosphate-6-kinase activity in pea roots.
abstract: A soluble extract from pea (Pisum sativum L.) roots, when incubated with ATP and inositol 1,4,5-trisphosphate, produced an inositol tetrakisphosphate. The chromatographic properties of this inositol tetrakisphosphate, and of the products formed by its chemical degradation, identify it as inositol 1,4,5,6-tetrakisphosphate. No evidence was obtained for a 3-phosphorylation of inositol 1,4,5-trisphosphate. The importance of these observations with respect to inositol phosphates and calcium signalling in higher plants, is discussed.
authors.affiliation: Department of Cell Biology, John Innes Institute, Colney Lane, NR4 7UH, Norwich, Norfolk, UK.
authors.forename: J A
authors.initials: JA
authors.lastname: Chattaway
authors.forename: B K
authors.initials: BK
authors.lastname: Drøbak
authors.forename: P A
authors.initials: PA
authors.lastname: Watkins
authors.forename: A P
authors.initials: AP
authors.lastname: Dawson
authors.forename: A J
authors.initials: AJ
authors.lastname: Letcher
authors.forename: L R
authors.initials: LR
authors.lastname: Stephens
authors.forename: R F
authors.initials: RF
authors.lastname: Irvine