filter_nucleotides#

biotite.structure.filter_nucleotides(array: AtomArray[N] | AtomArrayStack[M, N]) → ndarray[tuple[N], dtype[bool]][source]#

Filter all atoms of one array that belong to nucleotides.

Parameters:
arrayAtomArray or AtomArrayStack

The array to be filtered.

Returns:
filterndarray, dtype=bool

This array is True for all indices in array, where the atom belongs to a nucleotide.

Notes

Nucleotides are identified according to the PDB chemical component dictionary. A residue is considered a nucleotide if it its _chem_comp.type property has one of the following values (case insensitive):

DNA LINKING, DNA OH 3 PRIME TERMINUS, DNA OH 5 PRIME TERMINUS, L-DNA LINKING, L-RNA LINKING, RNA LINKING, RNA OH 3 PRIME TERMINUS, RNA OH 5 PRIME TERMINUS

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