loop_ _pdbx_buffer_components.buffer_id _pdbx_buffer_components.id _pdbx_buffer_components.name _pdbx_buffer_components.volume _pdbx_buffer_components.conc _pdbx_buffer_components.details 1 1 'NaCl' '0.200 ' '4 ' . 1 2 'Acetic Acid' '0.047 ' '100' . 1 3 'water' '0.700 ' 'neat' .