Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1983-6-10
pubmed:abstractText
Surface antigens (i-Ags) G and D of Paramecium primaurelia, reported earlier to be completely unrelated on the basis of peptide mapping and immunological tests, were compared and found to be similar in molecular weight (Mr 235,000), isoelectric point (ca. 4.5), and amino acid composition. They are tightly folded proteins with more than 100 intramolecular disulfide bonds. Native i-Ags and their CNBr fragments were blotted onto nitrocellulose and labeled with a battery of homologous and heterologous antibodies fractionated on native and reduced i-Ag immunoadsorbents. It was found the i-Ags retained part of their antigenic structure upon cleavage and reduction. Analysis of labeling revealed that the two proteins share many of their antigenic sites, though they are completely distinct in their native conformation. Immunofluorescence and immunoadsorption on fixed cells confirmed these results. Antigenic crossreactivity also was found with surface antigens of a ciliate outside the Paramecium species complex. It is concluded that surface specificity of paramecia is due, in this case, to the expression of related proteins in different conformations.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-1151907, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-1259153, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-13130792, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-13800990, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-13902203, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-13916508, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-14023808, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-14343127, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-14416397, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-14434717, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-15415003, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-16593120, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-17247376, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-17247859, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-359366, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-388439, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-4361679, http://linkedlifedata.com/resource/pubmed/commentcorrection/6189117-5432063
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:volume
80
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1003-7
pubmed:dateRevised
2010-9-13
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Immunological crossreactivity of Paramecium surface antigens: conformational differences account for cell surface specificity.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't