Data items in the REFINE_B_ISO category record details about the treatment of isotropic B (temperature) factors during refinement.
loop_ _refine_B_iso.pdbx_refine_id _refine_B_iso.class _refine_B_iso.treatment 'x-ray' 'protein' isotropic 'x-ray' 'solvent' isotropic 'x-ray' 'inhibitor' isotropic