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Full-Text Articles in Life Sciences
Evolution Of Cyrtandra (Gesneriaceae) In The Pacific Ocean: The Origin Of A Supertramp Clade, Quentin C. B. Cronk, Michael Kiehn, Warren L. Wagner, James F. Smith
Evolution Of Cyrtandra (Gesneriaceae) In The Pacific Ocean: The Origin Of A Supertramp Clade, Quentin C. B. Cronk, Michael Kiehn, Warren L. Wagner, James F. Smith
James F. Smith
Cyrtandra comprises at least 600 species distributed throughout Malesia, where it is known for many local endemics and in Polynesia and Micronesia, where it is present on most island groups, and is among the most successfully dispersing genera of the Pacific. To ascertain the origin of the oceanic Pacific island species of Cyrtandra, we sequenced the internal transcribed spacers of nuclear ribosomal DNA of samples from throughout its geographical range. Because all oceanic Pacific island species form a well-supported clade, these species apparently result from a single initial colonization into the Pacific, possibly by a species from the eastern rim …
The Α1 Chain Of Collagen Xi, Posttranslational Modifications, And The Pericellular Matrix, Katey Irwin
The Α1 Chain Of Collagen Xi, Posttranslational Modifications, And The Pericellular Matrix, Katey Irwin
McNair Scholars Research Journal
Collagen type XI is a quantitatively minor but developmentally essential component of the extracellular matrix and as a secreted protein is subject to a variety of posttranslational modifications. These modifications have been shown to influence the affinity of endogenous binding between collagen XI and various extracellular matrix components. The three dimensional structure of the amino terminal domain (Npp) of this molecule has been determined through homology modeling. As a result a putative heparan sulfate binding site has been predicted. Heparan sulfate is an abundant sugar found on the surface of most cells and on proteoglycan molecules of the pericellular matrix. …