Data Item _ndb_struct_ntc_step_summary.assigned_CANA
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General 
- Item name
- _ndb_struct_ntc_step_summary.assigned_CANA
- Category name
- ndb_struct_ntc_step_summary
- Attribute name
- assigned_CANA
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The assigned CANA for the nucleotide step.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| A-B | A to B transition steps (first nucleotide A, second B) |
| AAA | steps in the A form |
| AAu | A forms with bases partially unstacked |
| AAw | steps in the A form but some torsions (typically and ) have values switched from the typical values |
| B-A | B to A transition steps (first nucleotide B, second A) |
| B12 | Steps with torsion values bridging B and BII forms |
| BB2 | Steps in the BII ("b-two") form |
| BBB | Steps in the B form |
| BBw | Steps in the B form but some torsions (typically and ) have values switched from the typical values |
| ICL | Steps with parallel but distant bases that can be intercalated |
| NAN | Unassigned steps |
| OPN | Steps with unstacked, frequently distant bases and untypical torsion values |
| SYN | Steps containing base in the syn orientation |
| ZZZ | steps in the Z form |
| miB | Steps with B like sugar puckers and stacked bases but untypical torsion values |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| A-B | A to B transition steps (first nucleotide A, second B) |
| AAA | steps in the A form |
| AAu | A forms with bases partially unstacked |
| AAw | steps in the A form but some torsions (typically and ) have values switched from the typical values |
| B-A | B to A transition steps (first nucleotide B, second A) |
| B12 | Steps with torsion values bridging B and BII forms |
| BB2 | Steps in the BII ("b-two") form |
| BBB | Steps in the B form |
| BBw | Steps in the B form but some torsions (typically and ) have values switched from the typical values |
| ICL | Steps with parallel but distant bases that can be intercalated |
| NAN | Unassigned steps |
| OPN | Steps with unstacked, frequently distant bases and untypical torsion values |
| SYN | Steps containing base in the syn orientation |
| ZZZ | steps in the Z form |
| miB | Steps with B like sugar puckers and stacked bases but untypical torsion values |