Editing LiteMol:SelectionAlgebra (section)

==Basic queries==
{| class="wikitable"
! colspan="3" | List of selection queries
|-
!Query definition
!Example
!Selection description
|-
| <code>  atomsByElement(elements: string[]) </code >
| <code>  atomsByElement('C'), atomsByElement('C','O') </code>
| Atoms based on their element symbol (field ''_atom_site.type_symbol'').
|-
| <code>  atomsByName(elements: string[]) </code>
| <code>  atomsByName('C'), atomsByName('N','CA','C','O') </code>
| Atoms based on their atom name (field ''_atom_site.label_atom_id'').
|-
| <code>  atomsById(numbers: number[]) </code>
| <code>  atomsById(1), atomsById(1,2,3) </code>
| Atoms based on their integer identifier (field ''_atom_site.id '').
|-
| <code>  residuesByName(elements: string[]) </code>
| <code>  residuesByName('GLY'), residuesByName('ALA', 'PO4') </code>
| Residues based on their residue name (field ''_atom_site.label_comp_id'').
|-
| <code>  residuesById(numbers: number[]) </code>
| <code>  residuesById(100), residuesById(42,157,238) </code>
| Residues based on integer identified (field ''_atom_site.auth_seq_id'').
|-
| <code>  chainsById(elements: string[]) </code>
| <code>  chainsById('A'), chainsById('A', 'B') </code>
| Polymer chains based on their id (field ''_atom_site.auth_asym_id'').
|-
| <code> backbone() </code>
| <code> backbone() </code>
| Extracts structure backbone defined by certain atom names. '''Protein:''' ''N'', ''CA'', ''C'', ''O''. '''Nucleotide:''' ''P'', ''OP1'', ''OP2'', ''O3' '', ''O5' '', ''C3' '', ''C5' ''.
|-
| <code> sidechain() </code>
| <code> sidechain() </code>
| Complement to the previous query, i.e. all ''polymer'' atoms without such name are reported.
|-
| <code> hetGroups() </code>
| <code> hetGroups() </code>
| ''HETATM'' atoms defined by the field ''_atom_site.group_PDB''.
|-
| <code> nonHetPolymer() </code>
| <code> nonHetPolymer() </code>
| ''ATOM'' atoms defined by the field ''_atom_site.group_PDB''.
|-
|<code> cartoon() </code>
|<code> cartoon() </code>
| Extracts atoms vital for ''polymer'' cartoon visualization based on their names: ''CA'', ''O'', ''O5' '', ''C3' '', ''N3''.
|-
| <code> everything() </code>
| <code> everything() </code>
| All atoms in the active context.
|-
|}