Linked Life Data

7225369

Source:http://linkedlifedata.com/resource/pubmed/id/7225369

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
1981-7-23
pubmed:abstractText
The solution properties of five samples of human immunoglobulin A (IgA) were investigated with covalent and hydrophobic fluorescence probes. The immunoglobulins included a secretory IgA and four myeloma proteins of both IgA1 and IgA2 subclasses in the monomeric and dimeric forms. The probe 8-anilinonaphthalene-1-sulfonate (ANS) was found to bind to both monomeric and dimeric IgA with comparable affinity. Pyrenesulfonyl chloride covalently linked to the proteins exhibited multiexponential decays. The decay of ANS complexed to the same proteins showed similar multiple exponential character. The rotational motions of the immunoglobulins were investigated by the nanosecond fluorescence anisotropy decay method. The decay of both probes attached to these proteins was characterized by a fast component followed by a slow component. The rapid component was in the range 14-26 ns for th covalent conjugates and 26-41 ns for the ANS complexes. These results are interpreted in terms of a segmental motion arising from a mass in the range 60 000-100 000 daltons, If the decrease in the anisotropy value at long times is taken as a measure of restricted diffusion of the mobile fragment, the half-angle of a cone within which the fragment traverses may provide a qualitative measure of the extent of flexibility. By this criterion, monomeric and dimeric IgA's of the same subclass appear to be qualitatively similar in flexibility.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1997-203
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
Nanosecond fluorescence spectroscopy of human immunoglobulin A.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.