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Chemical modification and inactivation of rat liver microsomal ...

The alkylating agent 2-bromo-4'-nitroacetophenone (BrNAP) binds covalently to each of 10 isozymes of purified rat liver microsomal cytochrome P-450 (P-450a-P-450j) but substantially inhibits the catalytic activity of only cytochrome P-450c. Regardless of pH, incubation time, presence of detergents, or concentration of BrNAP, treatment of cytochrome P-450c with BrNAP resulted in no more than 90 ...

Chemical modification and inactivation of rat liver microsomal ...

BrNAP-2 were identical (see footnote to Table 111) and that In summary, the results of the present study show that they corresponded to peptide T-36 previously sequenced from BrNAP alkylates each of 10 purified isozymes of rat liver unalkylatedcytochrome P-45Oc (18). Theamino acid se- microsomal cytochromeP-450 (P-450a-P-450j), as well as 11486 ...

Chemical modification and inactivation of rat liver microsomal ... - PubMed

The alkylating agent 2-bromo-4'-nitroacetophenone (BrNAP) binds covalently to each of 10 isozymes of purified rat liver microsomal cytochrome P-450 (P-450a-P-450j) but substantially inhibits the catalytic activity of only cytochrome P-450c. Regardless of pH, incubation time, presence of detergents, or concentration of BrNAP, treatment of ...

Mechanism of inactivation of rat liver microsomal cytochrome P-450c by ...

The mechanism by which 2-bromo-4'-nitroacetophenone (BrNAP) inactivates cytochrome P-450c, which involves alkylation primarily at Cys-292, is shown in the present study to involve an uncoupling of NADPH utilization and oxygen consumption from product formation. Alkylation of cytochrome P-450c with BrNAP markedly stimulated (approximately 30-fold) its rate of anaerobic reduction by NADPH ...

2-Bromo-4′-nitroacetophenone technical, ≥95% (AT) | Sigma-Aldrich

The alkylating agent 2-bromo-4'-nitroacetophenone (BrNAP) binds covalently to each of 10 isozymes of purified rat liver microsomal cytochrome P-450 (P-450a-P-450j) but substantially inhibits the catalytic activity of only cytochrome P-450c. Regardless of pH, incubation time, presence of detergents, or concentration

Microbes, not humans: exploring the molecular basis of ... - Springer

Objective Bacterial RNA polymerase (bRNAP) represent a crucial target for curtailing microbial activity but its structural and sequence similarities with human RNA polymerase II (hRNAPII) makes it difficult to target. Recently, Pseudouridimycin (PUM), a novel nucleoside analogue was reported to selectively inhibit bRNAP and not hRNAP. Till date, underlying mechanisms of PUM selectivity remains ...

(PDF) Mechanism of inactivation of rat liver microsomal cytochrome P ...

The mechanism by which 2-bromo-4'-nitroacetophenone (BrNAP) inactivates cytochrome P-450c, which involves alkylation primarily at Cys-292, is shown in the present study to involve an uncoupling of ...

Microbes, not humans: exploring the molecular basis of ... - PubMed

Objective: Bacterial RNA polymerase (bRNAP) represent a crucial target for curtailing microbial activity but its structural and sequence similarities with human RNA polymerase II (hRNAPII) makes it difficult to target. Recently, Pseudouridimycin (PUM), a novel nucleoside analogue was reported to selectively inhibit bRNAP and not hRNAP. Till date, underlying mechanisms of PUM selectivity ...

Multisubunit RNA polymerases - ScienceDirect

The independently determined yRNAP and bRNAP structures reveal that five 'core' subunits underlie a general RNAP architecture. The two large subunits form the central mass of the enzyme and opposite sides of a positively charged cleft (Rpb1 and Rpb2 in yRNAP; β′ and β in bRNAP; Table 1, Fig. 1).The two large subunits are anchored by two small core subunits that are involved in RNAP ...

Brná - Wikipedia

Brná (German: Birnai), also known as Brná nad Labem to distinguish from other places with the same name, is an administrative part and residential area in Ústí nad Labem, Czech Republic.It is located in landscape park České Středohoří on the right side of river Elbe.It is about 4 km far from Ústí nad Labem and its area is about 4.23 km². [2]

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