Linked Life Data

3790583

Source:http://linkedlifedata.com/resource/pubmed/id/3790583

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1987-2-19
pubmed:abstractText
We have studied the effect of chlorophyll a (chl a) on the X-ray diffraction patterns and the appearance of freeze-fracture electron micrographs of aqueous dispersions of monogalactosyldiacylglycerols (MGDG), the most abundant lipid in the thylakoid membrane. In MGDG systems containing 0-18 mol% of chl a, the diffraction patterns indicate the presence of a well-ordered reverse hexagonal phase. When 30 mol% of chl a was incorporated into the MGDG, the low-angle X-ray diffraction lines of the hexagonal lattice were slightly broadened and were accompanied by additional weak lines. With higher mol percents of chl a, the low-angle lines could no longer be indexed on a hexagonal or lamellar lattice. The freeze-fracture electron micrographs of similar samples showed that the patterns characteristic of the reverse hexagonal phase of an aqueous dispersion of pure MGDG were replaced by large liposomes, the fracture pattern of which is circular. We conclude that chl a in excess of 20 mol% destabilized the orderly reverse hexagonal phase of aqueous MGDG dispersions and disturbed the long-range order of the lipid array. These results are summarized in a temperature-composition isobaric phase diagram over a temperature range of -60 degrees C to 60 degrees C.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
896
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
11-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Effect of chlorophyll a on the phase behavior of hydrated monogalactosyldiacylglycerols.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't