Data Item _pdbx_nmr_spectral_dim.under_sampling_type
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General 
- Item name
- _pdbx_nmr_spectral_dim.under_sampling_type
- Category name
- pdbx_nmr_spectral_dim
- Attribute name
- under_sampling_type
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The type of spectral folding/aliasing that was used or occurred when the spectrum was collected.
Item Example1
aliased
Item Example2
folded
Item Example3
not observed
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
| Allowed Value | Details |
|---|---|
| aliased | Under sampling that results in observed peaks that have circular chemical shift offsets |
| folded | Under sampling that results in observed peaks that have chemical shift offsets that are folded relative to the left or right edge of the spectral window |
| not observed | Neither aliased nor folded peaks were observed |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| aliased | Under sampling that results in observed peaks that have circular chemical shift offsets |
| folded | Under sampling that results in observed peaks that have chemical shift offsets that are folded relative to the left or right edge of the spectral window |
| not observed | Neither aliased nor folded peaks were observed |