title: Extended X-ray absorption fine-structure study of the bound form of lanthane in chlorophyll-a from Dicranopteris dichotoma.
abstract: The in vivo coordination structure of lanthanum ions interacting with chlorophyll-a of the fern Dicranopteris dichotoma grown in a rare earth minefield in southern China was determined by the extended x-ray absorption fine structure (EXAFS). The results show that lanthanum includes two porphyrin rings in its coordination sphere. It is postulated that the La-chlorophyll-a complex may have a bilayer structure. The analytical method may serve as a new tool to gain insight in the in vivo interactions of rare earth elements.
authors.affiliation: Department of Biology, Suzhou University, Jiangsu, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Fashu
authors.forename: W
authors.initials: W
authors.lastname: Zhenggui
authors.forename: Z
authors.initials: Z
authors.lastname: Guiwen
authors.forename: T
authors.initials: T
authors.lastname: Ye
authors.forename: H
authors.initials: H
authors.lastname: Tiandou
authors.forename: X
authors.initials: X
authors.lastname: Yanin
authors.forename: L
authors.initials: L
authors.lastname: Tao
mesh_terms: D002681:China; D002734:Chlorophyll / Q000737:chemistry*; D000077194:Chlorophyll A; D029624:Ferns / Q000737:chemistry / Q000254:growth & development; D007811:Lanthanum / Q000737:chemistry*; D008674:Metals, Rare Earth / Q000032:analysis; D015394:Molecular Structure; D013052:Spectrometry, X-Ray Emission
chemical_list: D008674:Metals, Rare Earth; D002734:Chlorophyll; D007811:Lanthanum; D000077194:Chlorophyll A