Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Fred P. Abramson"'
Publikováno v:
Proceedings of the National Academy of Sciences. 101:8858-8863
A remote labeling method has been developed to determine 18 O kinetic isotope effects (KIEs) in Ras-catalyzed GTP hydrolysis. Substrate mixtures consist of 13 C-depleted GTP and [ 18 O, 13 C]GTP that contains 18 O at phosphoryl positions of mechanist
Publikováno v:
American Journal of Kidney Diseases. 42:561-566
Background: Dialyzers reprocessed with chlorine-based solutions have been associated with increases in ultrafiltration coefficient and middle-molecule removal. Increased pore size has been hypothesized as the mechanism for the latter phenomenon. Dial
Publikováno v:
Journal of Biochemical and Biophysical Methods. 56:141-152
Size-exclusion chromatography (SEC) is a separation technique with a relatively low resolving power, compared to those usually utilized in proteomics. Therefore, it is often overlooked in experimental protocols, when the main goal is resolving comple
Autor:
Fred P. Abramson
Publikováno v:
Seminars in Perinatology. 25:133-138
Although there is a long history of stable isotopes use in drug metabolism research, it is appropriate to evaluate them in pregnancy drug studies in which safety takes highest priority. It is well established through a number of human and animal expe
Publikováno v:
Rapid Communications in Mass Spectrometry. 15:602-607
This paper describes the use of chemical reaction interface mass spectrometry (CRIMS) combined with liquid chromatography for the detection of trace level sulfur-containing impurities in pharmaceutical materials. A mixture of sulfur- and non-sulfur-c
Autor:
Fred P. Abramson, Paolo Lecchi
Publikováno v:
Analytical Chemistry. 71:2951-2955
Size exclusion chromatography (SEC) has been coupled to chemical reaction interface mass spectrometry (CRIMS) for the analysis of biopolymers. This innovative combination allows the analysis of biopolymers with no limitation on the molecular weight a
Autor:
Fred P. Abramson, Paolo Lecchi
Publikováno v:
Journal of Chromatography A. 828:509-513
Autor:
Blaire L. Osborn, Fred P. Abramson
Publikováno v:
Biopharmaceutics & Drug Disposition. 19:439-444
We present a novel method for performing pharmacokinetic and metabolism studies on macromolecules that offers advantages over the existing techniques of radiolabeling, immunoassay or bioassays. Our strategy uses macromolecules with stable isotopes un
Autor:
Fred P. Abramson, Pei Chen
Publikováno v:
Analytical Chemistry. 70:1664-1669
We have devised and evaluated a stable-isotopic method for measuring DNA synthesis rates. The probe is [1-13C]-glycine that is incorporated into purines via de novo biosynthesis. The human hepatoma cell line HEP G2 was grown in medium containing [1-1
Autor:
Fred P. Abramson, Blaire L. Osborn
Publikováno v:
Journal of Labelled Compounds and Radiopharmaceuticals. 39:935-953
In order to implement a new strategy for determining the kinetics and metabolism of therapeutic proteins, we had to produce milligram quantities of a uniformly stable isotope labelled species. To produce the labelled protein, the rat pituitary tumor