using System

# import 〈System〉

uses System

# include 〈System〉

We’ll check all the employees in addition to the requirements of common people

We’ll raise the demands for VIP protection

VIP protection is so important that we have to screen employees

We’ll screen all the employees according to the requirements of VIP protection

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using System;

# import ;

uses System;

# include ;

A．using System;

# import ;

uses System;

# include ;

Because

Thanks to

So as to

In addition to

Some key cellular functions are regulated by enzymes that use NAD + not as a redox cofactor but as a substrate in a coupled reaction in which the availability of NAD + can be an indicator of the cell’s energy status.

A family of proteins called sirtuins regulate the activity of proteins in diverse cellular pathways by deacetylating the ε-amino group of an acetylated Lys residue. The deacetylation is coupled to NAD + hydrolysis, yielding O -acetyl-ADPribose and nicotinamide.

NAD + also plays an important role in cholera infections. Cholera toxin has an enzymatic activity that transfers ADP-ribose from NAD + to a G protein involved in regulating ion fluxes in the cells lining the gut. This ADP-ribosylation blocks water retention, causing the diarrhea and dehydration characteristic of cholera.

Both nicotinic acid and nicotinamide cure pellagra.