Data Item _chem_comp.three_letter_code

General

Item name
_chem_comp.three_letter_code
Category name
chem_comp
Attribute name
three_letter_code
Required in PDB entries
no
Used in currrent PDB entries
No
Used in the Chemical Component dictionary
Yes

Item Description

For standard polymer components, the three-letter code for the component. If there is not a standard three-letter code for this component, or if this is a non-polymer component, the three-letter code should be given as 'UNK'. This code may be preceded by a '+' character to indicate that the component is a modification of a standard component.

Data Type

Data type code
uchar3
Data type detail
data item for 3 character codes
Primitive data type code
uchar
Regular expression
[+]?[A-Za-z0-9]?[A-Za-z0-9][A-Za-z0-9]