Data Item _em_icos_virus_shells.triangulation_num

General

Item name
_em_icos_virus_shells.triangulation_num
Category name
em_icos_virus_shells
Attribute name
triangulation_num
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

The triangulation number (T number) is a geometric and abstract concept that does not correspond to the structural components of an individul virus. It refers to the organisation of the geometric figure. The triangulation number, T is given by the following relationship: T= h*2 + hk +k*2, where h and k are positive integers which define the position of the five-fold vertex on the original hexagonal net.

Item Example

 4

Data Type

Data type code
int
Data type detail
int item types are the subset of numbers that are the negative or positive integers.
Primitive data type code
numb
Regular expression
[+-]?[0-9]+