Diana P Vineyard

Diana P Vineyard
Southern Methodist University | SMU · Department of Earth Sciences

MS Geological Sciences

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12
Publications
3,694
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219
Citations
Citations since 2017
1 Research Item
67 Citations
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201720182019202020212022202305101520
201720182019202020212022202305101520
Introduction
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Publications

Publications (12)
Article
Full-text available
A new stem cheloniid turtle, Cabindachelys landanensis, gen. et sp. nov., is represented by a nearly complete skull and partial hyoid collected in lower Paleocene shallow marine deposits, equivalent to the offshore Landana Formation, near the town of Landana in Cabinda, Angola. A partial chelonioid carapace previously reported from this locality is...
Conference Paper
Full-text available
We report a new chelonioid turtle on the basis of a nearly complete skull collected in lower Paleocene, shallow marine deposits, equivalent to the offshore Landana Formation, near the town of Landana in Cabinda Province, Angola. Chelonioid material previously reported from this locality is likely referable to this new taxon. The well-preserved skul...
Article
Full-text available
2010.15 Africa is the only continent that now straddles arid zones located beneath the descending limbs of both the northern and southern Hadley cells, and it has done so since it became a distinct continent in the Early Cretaceous. Since that time, Africa has drifted tectonically some 12 degrees north and rotated approximately 45 degrees countercl...
Article
Full-text available
A new Late Cretaceous turtle, Angolachelys mbaxi gen. et sp. nov., from the Turonian (90 Mya) of Angola, represents the oldest eucryptodire from Africa. Phylogenetic analysis recovers Angolachelys mbaxi as the sister taxon of Sandownia harrisi from the Aptian of Isle of Wight, England. An unnamed turtle from the Albian Glen Rose Formation of Texas...
Article
Full-text available
2009.03 The Cretaceous tropical Atlantic Ocean was the setting for an initial tectonically controlled late Aptian shal-low water (300 m) connection between the northern and southern portions of the Atlantic, followed by a deep-water connection by the Turonian. Ocean currents changed with deepening of the South Atlantic and progressive widening of t...
Article
The promutagenic process known as translesion DNA synthesis reflects the ability of a DNA polymerase to misinsert a nucleotide opposite a damaged DNA template. To study the underlying mechanism of nucleotide selection during this process, we quantified the incorporation of various non-natural nucleotide analogs opposite an abasic site, a non-templa...
Article
Lon is an oligomeric serine protease whose proteolytic activity is mediated by ATP hydrolysis. Although each monomeric subunit has an identical sequence, Lon contains two types of ATPase sites that hydrolyze ATP at drastically different rates. The catalytic low-affinity sites display pre-steady-state burst kinetics and hydrolyze ATP prior to peptid...
Article
Lon is an ATP-dependent serine protease that degrades damaged and certain regulatory proteins in vivo. Lon exists as a homo-oligomer and represents one of the simplest ATP-dependent proteases because both the protease and ATPase domains are located within each monomeric subunit. Previous pre-steady-state kinetic studies revealed functional nonequiv...
Article
Escherichia coli Lon, also known as protease La, is an oligomeric ATP-dependent protease, which functions to degrade damaged and certain short-lived regulatory proteins in the cell. To investigate the kinetic mechanism of E. coli Lon protease, we performed the first pre-steady-state kinetic characterization of the ATPase and peptidase activities of...
Article
Escherichia coli Lon, also known as protease La, is a serine protease that is activated by ATP and other purine or pyrimidine triphosphates. In this study, we examined the catalytic efficiency of peptide cleavage as well as intrinsic and peptide-stimulated nucleotide hydrolysis in the presence of hydrolyzable nucleoside triphosphates ATP, CTP, UTP,...

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Projects

Project (1)
Project
PaleoAngola Project (www.paleoangola.org) is an international project for the study of Vertebrate Paleontology and Geology of Angola. This project comprised regular field expeditions since 2005 in Angola with the participation of several scientific institutions: Departamento de Geologia da Universidade Agostinho Neto (Angola), Southern Methodist University (Texas, USA), Museu da Lourinhã (Portugal), Universidade Nova de Lisboa (Portugal). The results of fieldwork in Cretaceous sites have been extraordinarily spectacular, with the discovery of the first dinosaur of Angola, dating from the Late Cretaceous, and mosasaurs, plesiosaurs, ammonites and fossil turtles. For example, in the 2010 expedition about 3.5 tonnes of fossil bearing blocks were collected, including putative new species. Besides the scientific objectives, we aim to create a strong and lasting institutional and scientific collaboration with the Angolan academia.