In PDB files you could put all information about protein delivery buffer, crystallisation conditions and cryo conditions in REMARK 280
(and pull it through in refmac with keyword pdbout copy remarks 280 ) Where are you meant to put all the information about what could be in your crystal in mmcif_pdbx? Thanks, Ben Web (below) does not seem to give any very clear answers and I could not work it out from looking at half a dozen recent pdb entries. Data item below is used in zero depositions. .. Data items in the PDBX_EXPTL_CRYSTAL_GROW_COMP category record details about the components of the solutions that were 'mixed' to produce the crystal. http://mmcif.wwpdb.org/dictionaries/mmcif_pdbx_v40.dic/Categories/pdbx_exptl_crystal_grow_comp.html loop_ _pdbx_exptl_crystal_grow_comp.crystal_id _pdbx_exptl_crystal_grow_comp.sol_id _pdbx_exptl_crystal_grow_comp.comp_id _pdbx_exptl_crystal_grow_comp.comp_name _pdbx_exptl_crystal_grow_comp.conc _pdbx_exptl_crystal_grow_comp.conc_range _pdbx_exptl_crystal_grow_comp.conc_units 4 'protein' 1 'protein' 25. . 'mg/ml' 4 'protein' 2 'Tris HCl' 20. . 'millimolar' 4 'protein' 3 'NaCl' 0.2 . 'molar' 4 'precipitant' 1 'PEG 4000' 12.5 . 'percent_weight_by_volume' 4 'precipitant' 2 'MES' 0.1 . 'molar' pdbout copy remarks 280 ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1