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141.
Enzyme‐Mediated,Site‐Specific Protein Coupling Strategies for Surface‐Based Binding Assays
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Dr. Wolfgang Ott Ellis Durner Prof. Dr. Hermann E. Gaub 《Angewandte Chemie (International ed. in English)》2018,57(39):12666-12669
Covalent surface immobilization of proteins for binding assays is typically performed non‐specifically via lysine residues. However, receptors that either have lysines near their binding pockets, or whose presence at the sensor surface is electrostatically disfavoured, can be hard to probe. To overcome these limitations and to improve the homogeneity of surface functionalization, we adapted and optimized three different enzymatic coupling strategies (4′‐phosphopantetheinyl transferase, sortase A, and asparaginyl endopeptidase) for biolayer interferometry surface modification. All of these enzymes can be used to site‐specifically and covalently ligate proteins of interest via short recognition sequences. The enzymes function under mild conditions and thus immobilization does not affect the receptors’ functionality. We successfully employed this enzymatic surface functionalization approach to study the binding kinetics of two different receptor–ligand pairs. 相似文献
142.
O. Jeandupeux Ch. Wälti H. R. Ott A. van Otterlo 《Czechoslovak Journal of Physics》1996,46(3):1211-1212
We present the results of measurements of the magnetizationM(T) and the specific heatC p (T) of YBa2Cu3O6.9 and Bi2Sr2CaCu2O8 in the vicinity of their respective critical temperature and in magnetic fields between 0 and 5 T. From these data we calculate the temperature- and magnetic field derivatives ofM andC p . Both these measured and calculated quantities are used for testing theoretical predictions concerning the universality class of the transitions and to verify the influence of fluctuations accompanying the transitions. 相似文献
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J. Brenneisen D. Grathwohl M. Lickert R. Ott H. Röpke J. Schmälzlin P. Siedle B. H. Wildenthal 《Zeitschrift für Physik A Hadrons and Nuclei》1995,352(2):149-159
The systematics of-decay modes and radiative widths of highly excited states in28Si has been extended by taking-ray spectra on 60 resonances of the27Al(p,) reaction in the range 1097 keVE
p
4492 keV (12643 keVE
x
15915 keV) and on the24Mg(,) resonances atE
=3355, 3431, 4003 keV (E
x
=12860, 12925, 13 415 keV). The-decay modes of levels in the sub-resonance region (E
x
=10–12.5 MeV) were studied with both the27
A1(p, ) reaction and the27
A1(d, n) reaction at Ed=4,5,6 MeV. Information on radiative widths of levels was obtained by measuring the resonance strengthsS
=(2I+1)
p
/ for 52 resonances of the27Al(p, ) reaction with an emphasis on prospective T=1 states. 相似文献
150.