Data Item _em_virus_shell.triangulation

General

Item name
_em_virus_shell.triangulation
Category name
em_virus_shell
Attribute name
triangulation
Required in PDB entries
no
Used in current PDB entries
Yes, in about 0.04 % of entries

Item Description

The triangulation number (T number) is a geometric concept that refers to the organisation of subunits within the icosahedron. The triangulation number, T is given by the 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

 27

Data Type

Data type code
positive_int
Data type detail
Positive integers (1,2,3,..)
Primitive data type code
numb
Regular expression
[1-9][0-9]*