Table 2: chem_comp_atom category: tokens in this section are looped through for each atom in the chemical component
Token	Definition	Example
_chem_comp_atom.comp_id	Same as _chem_comp.id	HYP
_chem_comp_atom.atom_id	Identifier for each atom in the chemical component - new format	CA
_chem_comp_atom.alt_atom_id	Previous format of identifier for each atom in the chemical component.	CA
_chem_comp_atom.type_symbol	The element type for each atom in the chemical component.	C O N, etc.
_chem_comp_atom.charge	The formal charge assigned to each atom in the chemical component.	0
_chem_comp_atom.pdbx_align	Determines which column the atom name appears within the PDB coordinate files. The possible values are 0 or 1.	0 or 1
_chem_comp_atom.pdbx_aromatic_flag	Defines atoms in an aromatic moiety.	Y or N
_chem_comp_atom.pdbx_leaving_atom_flag	Flags atoms with "leaving" capability.	Y or N
_chem_comp_atom.pdbx_stereo_config	Defines the stereochemical configuration of the chiral center atom.	R or S or N
_chem_comp_atom.model_Cartn_x	The x component of the coordinates for each atom specified as orthogonal angstroms.	26.056
_chem_comp_atom.model_Cartn_y	The y component of the coordinates for each atom specified as orthogonal angstroms.	5.609
_chem_comp_atom.model_Cartn_z	The z component of the coordinates for each atom specified as orthogonal angstroms.	5.594
_chem_comp_atom.pdbx_model_Cartn_x_ideal	Computed idealized coordinates, x component of the vector (in Angstroms)	number
_chem_comp_atom.pdbx_model_Cartn_y_ideal	Computed idealized coordinates, y component of the vector (in Angstroms)	number
_chem_comp_atom.pdbx_model_Cartn_z_ideal	Computed idealized coordinates, z component of the vector (in Angstroms)	number
_chem_comp_atom.pdbx_ordinal	Ordinal index for the chemical component atom list.	1 (integer)