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Displaying 451 - 459 of 459

Development of Standard Reference Material (SRM) 2973 Vitamin D Metabolites in Frozen Human Serum (High Level)

July 24, 2017
Author(s)
Susan Tai, Michael Nelson, Brian Lang, Karen W. Phinney, Lane C. Sander, James H. Yen, J. M. Betz, Christopher T. Sempos, Stephen Wise
… D2 [25(OH)D2], 25-hydroxyvitamin D3 [25(OH)D3], 3-epi-25(OH)D3, and total 25(OH)D3 [sum of 25(OH)D2 + … 1.59 ± 0.05 nmol/L for 25(OH)D2 and 5.23 ± 0.20 nmol/L for 3-epi-25(OH)D3. In addition, a candidate RMP for … nmol/L), Level 2 (3.39 nmol/L ± 0.12 nmol/L), Level 3 (3.88 nmol/L ± 0.013 nmol/L), and Level 4 (6.32 nmol/L ± 0.22 …

Examining maternal and environmental transfer of mercury into American alligator eggs

December 10, 2019
Author(s)
Stephen E. Long, Tracey Schock, Nilsen Frances
… egg yolk at Merritt Island National Wildlife Refuge, FL; 3) examine the Hg concentrations in wild maternal female … Hg (THg) concentrations observed at each site were 26.3 ng/g ± 11.0 ng/g (YWC), 8.8 ng/g ± 5.1 ng/g (LA), and 22.6 ng/g ± 6.3 ng/g (LW). No relationship was observed between THg in …

Kinetic, Stereochemical, and Structural Effects of Mutations of the Active Site Arginine Residues in 4-Oxalocrotonate Tautomerase

July 1, 1999
Author(s)
T K. Harris, R M. Czerwinski, W H. Johnson, P M. Legler, C Abeygunawardana, M A. Massiah, J T. Stivers, C P. Whitman, A S. Mildvan
… kinetic effects, while the R11A mutation decreased k cat 88-fold and increased K m 8.6-fold suggesting both binding … decreased, while the stereoselectivity of protonation at C-3 of the monocarboxylate substrate increased in comparison … cooperativity in active site binding with two K d values, 3.5 and 29 MM. This observation together with the low K m of …
Displaying 451 - 459 of 459
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