4-Fluoro-DL-tryptophan (4-F-TRP) is used to label bacterial arginyl-tRNA synthetases for conformational analysis and to label myoglobins and hemoglobins for NMR spectra analysis.
Journal of protein chemistry, 18(2), 187-192 (1999-05-20)
Escherichia coli 4-fluorotryptophan-substituted arginyl-tRNA synthetase was biosynthetically prepared and purified from a tryptophan auxotroph which could overproduce this enzyme. A method was developed to separate 4-fluorotryptophan from tryptophan and to determine accurately their contents in the 4-fluorotryptophan-containing proteins. It was
The Biochemical journal, 249(1), 305-308 (1988-01-01)
The tryptophan-auxotrophic Bacillus subtilis LC33 mutant strain utilizes either tryptophan or 4-fluorotryptophan for growth. Proteins therefore could be isolated from these cells in either tryptophan-containing or 4-fluorotryptophan-containing forms. Since 4-fluorotryptophan is non-fluorescent, tryptophan fluorescence would be suppressed in the 4-fluorotryptophan-containing
Clamp proteins confer processivity to the DNA polymerase during DNA replication. These oligomeric proteins are loaded onto DNA by clamp loader protein complexes in an ATP-dependent manner. The mechanism by which the trimeric bacteriophage T4 clamp protein (the 45 protein)
The Biochemical journal, 264(1), 297-299 (1989-11-15)
The derivative 4-fluorotryptophan was confirmed to have negligible fluorescence at 25 degrees C and 285 nm (tryptophan/4-fluorotryptophan quantum-yield ratio greater than 100:1). However, photolysis experiments on tryptophan and 4-fluorotryptophan, in which loss of starting material was measured by reverse-phase h.p.l.c.
We have obtained the 470 MHz 19F NMR spectra of wild type [4-F]Trp-labeled myoglobins (MbCO, MbO2, deoxyMb, metMb, and MbCN) and hemoglobins (HbCO, HbO2, and deoxyHb), as well as those of several mutants (W7F Mb, betaW15F Hb, betaW37S Hb, and
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