Data Item _em_imaging.electron_source
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General 
- Item name
- _em_imaging.electron_source
- Category name
- em_imaging
- Attribute name
- electron_source
- Required in PDB entries
- no
- Required for PDB deposition
- yes
- Used in current PDB entries
- Yes, in about 3.3 % of entries
Item Description
The source of electrons. The electron gun.
Data Type 
- Data type code
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| FIELD EMISSION GUN | |
| LAB6 | |
| OTHER | |
| TUNGSTEN HAIRPIN |