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1 DEPC (1 mM) abolished Zn2+-induced inhibition and also t
2 DEPC and [(14)C]DEPC modification, coupled with amino ac
3 DEPC does not affect the absorption spectrum of cytochro
4 DEPC has a primary (18)O isotope effect of 1.041 +/- 0.0
5 DEPC modification indicates that the I state in Na(+)-in
6 DEPC was used to further characterize the inhibition bec
7 he histidines using nonradiolabeled and [14C]DEPC indicates that between one and two histidine residu
11 yrocarbonate (DEPC) at a mole ratio of 0.74 (DEPC/total His residues) for 3 min at 25 degreesC comple
14 oth A 5-P and PEP protect the mutant against DEPC inactivation but to different extents from those ob
15 The H97G mutant is protected by PEP against DEPC inactivation to the same degree as the wild-type en
18 DAH 7-P synthase (Phe) is protected against DEPC inactivation by phosphoenolpyruvate, whereas d-eryt
20 on is first order with respect to enzyme and DEPC concentrations with a pseudo-second order rate cons
22 fication studies using hydroxyl radicals and DEPC identify nonoverlapping primary binding sites for S
23 d in vitro and in vivo by using the SEPC and DEPC MRI approaches were well correlated (r (2) > 0.97),
25 were carried out in explicit lipid bilayers (DEPC, POPC, DMPC, sphingomyelin), confirming the observe
29 4C]UDP-GlcUA uptake rates were diminished by DEPC treatment of intact microsomes, the accumulation of
32 ts that the inactivation of heparinase II by DEPC is specific for histidine residues and that three h
33 At pH 6.5 wild-type enzyme is inactivated by DEPC after derivatization of one histidine, shown to be
34 econd order rate constant of inactivation by DEPC of 4.9 +/- 0.8 m(-1) s(-1) at pH 6.8 and 4 degrees
35 protects the cytochrome from inactivation by DEPC, indicating that the essential histidine is in the
37 hains (Ser, Thr, and Tyr) can be modified by DEPC in addition to other residues such as His, Lys, and
49 at N-3 and G at N-1), diethylpyrocarbonate (DEPC; to probe A at N-7), dimethyl sulfate (DMS; to prob
50 ed carbonyl (ABUC) and diethylpyrocarbonate (DEPC), and insulin and beta2-microglobulin (beta2m) as m
52 study, we investigate diethylpyrocarbonate (DEPC) covalent labeling-mass spectrometry as a means of
53 study, we investigate diethylpyrocarbonate (DEPC) covalent labeling-mass spectrometry as a means of
54 ing when reagents like diethylpyrocarbonate (DEPC) are used for CL because of the differences in the
55 information content of diethylpyrocarbonate (DEPC) as a covalent probe of protein surface structure h
56 79A, and the effect of diethylpyrocarbonate (DEPC) have been investigated to elucidate the dehydratas
58 e His-specific reagent diethylpyrocarbonate (DEPC) showed that one or more His residues was specifica
59 l modification reagent diethylpyrocarbonate (DEPC) was used to modify alpha 1-acid glycoprotein (oros
61 y, we demonstrate that diethylpyrocarbonate (DEPC) covalent labeling mass spectrometry can provide bi
62 In this work, we use diethylpyrocarbonate (DEPC)-based covalent labeling together with LC-MS/MS ana
63 ibe a method that uses diethylpyrocarbonate (DEPC) labeling and mass spectrometry to detect three-dim
66 ical modification with diethylpyrocarbonate (DEPC) and site-directed mutagenesis demonstrating the si
67 sidues of tubulin with diethylpyrocarbonate (DEPC) at a mole ratio of 0.74 (DEPC/total His residues)
68 tems, we show that the slower time scale for DEPC labeling makes it only sensitive to changes in solv
75 ophobic residues promote a local increase in DEPC concentration such that serine, threonine, and tyro
76 ysis of O,O-diethylphosphorylcholine iodide (DEPC) and the primary (18)O effect in the alkaline hydro
78 in less than 3 min, and as low as 10 microM DEPC results in a 85% loss of heparinase I activity in 1
79 difying diethyl pyrocarbonate (DEPC); 0.3 mM DEPC results in 95% of heparinase I inactivation in less
81 otein structure and function, the ability of DEPC labeling/MS to distinguish histidine tautomers shou
82 ion with heparin followed by the addition of DEPC resulted in a loss of enzymatic activity toward hep
83 ly straightforward mass spectral analysis of DEPC-labeled proteins, we expect this method should be a
87 lity and histidine reactivity information of DEPC-modified OMD necessary for the design of experiment
89 k demonstrated the considerable potential of DEPC covalent labeling data to be used for accurate high
92 Ferri/ferrocyanide can mediate reduction of DEPC-treated cytochrome b(561) by ascorbic acid, indicat
93 rans DOPC (dielaidoyl phosphatidylcholine or DEPC) on the morphology of giant unilamellar vesicles (G
97 holine/1, 2-dielaidoyl-phosphatidylglycerol (DEPC/DEPG) liposomes at pH 5.0 as a function of peptide
99 diameter was measured by using the proposed DEPC method and compared with flowmeter measurements and
101 er low specificity of diethyl pyrocarbonate (DEPC) for histidine modification, we modified Tris-washe
102 e histidine-modifying diethyl pyrocarbonate (DEPC) inhibited acyltransferase activity, and acyltransf
108 hydrophobic reagents [diethyl pyrocarbonate (DEPC), p-bromophenacyl bromide] as compared to the more
111 e histidine-modifying diethyl pyrocarbonate (DEPC); 0.3 mM DEPC results in 95% of heparinase I inacti
112 ase is inactivated by diethyl pyrocarbonate (DEPC); activity can be fully restored by incubation with
114 ormone as model systems, we demonstrate that DEPC labeling can identify both specific protein regions
115 ments on model peptides, we demonstrate that DEPC reacts equally with both tautomeric forms to produc
116 ome b(561) by ascorbic acid, indicating that DEPC-inhibited cytochrome b(561) cannot accept electrons
118 tems, we demonstrate for the first time that DEPC can modify Ser and Thr residues in addition to His
127 8-P synthase activity is not restored to the DEPC-inactivated enzyme following treatment with hydroxy
128 imes were approximately 19% shorter with the DEPC method (TR, 5.7 msec) than with the SEPC method (TR
129 ds showed that decreasing bilayer thickness (DEPC-POPC-DMPC) led to an increase in the helix tilt ang
134 Experiments involving modification with DEPC suggest that a histidine is essential and is protec
135 that these residues almost never react with DEPC in free peptides, supporting the hypothesis that a