# `class pdb.SecondaryType`

Available on all platforms

Static data container defining secondary structure type.

## Class Fields

### `static var BRIDGE:Int`

id of bridge

### `static var COIL:Int`

id of coils

### `static var HELIX_3_10:Int`

id of 3-10 helices

### `static var HELIX_ALPHA:Int`

id of alpha helices

### `static var HELIX_PI:Int`

id of pi helices

### `static var NONE:Int`

id of non-amino acid residues

### `static var STRAND:Int`

id of strand

### `static var TURN:Int`

id of turn

### `static function toChar(t:Int):String`

Convert given secondary structure type `t` in integer to a character

- alpha helix: H
- 3-10 helix: 3
- pi helix: P
- beta strand: E
- coil: C
- turn: T
- bridge: B
- others: -

### `static function toString(t:Int):String`

Convert given secondary type `t` in integer to a string.

- helices: HELIX
- strand: STRAND
- coil, bridge: COIL