# AddSheet

NAME

    AddSheet - add sheet for schematic drawing

SYNOPSIS

    AddSheet

DESCRIPTION

Create a surface that serves as schematic drawing of a beta sheet. The surface will approximate all selected atoms that belong to the same sheet. An atom is considered belonging to a sheet if the residue it belongs to has the 'sheet' property set. Even if multiple atoms of one residue are selected, only one of them is taken for determining the surface, it is recommended to select just the CA atoms.

The surface will not exactly pass through the atoms, but a smoothing algorithm is applied. To get nice smoothing at the borders, it is good to select not just the sheet atoms, but also atoms that are adjacent to the sheet.

The command is very easy to use for structures that have just one beta sheet. Then the user can just select all CA atoms and execute the command, provided that the secondary structure is known from the PDB file or calculated using the `CalcSecondary` command.

If a structure has multiple beta sheets, they have to be created one after the other. It is best to start with all CA selected, create one sheet, deselect the atoms belonging to that sheet, creating the second sheet, etc.

The created primitives have the property "sheet".

EXAMPLE

    AddSheet

SEE ALSO

`ReadPdb`, `CalcSecondary`, `SelectAtom`, `DefPropRes`, `AddRibbon`, `ColorPrim`, `TintPrim`, `ShadePrim`, `RemovePrim`

DATE

970723