PMID- 15299723 OWN - NLM STAT- PubMed-not-MEDLINE DA - 20040809 DCOM- 20050215 LR - 20070724 IS - 0907-4449 (Print) IS - 0907-4449 (Linking) VI - 52 IP - Pt 1 DP - 1996 Jan 1 TI - Methods used in the structure determination of bovine mitochondrial F1 ATPase. PG - 30-42 AB - With a size of 372 kDa, the F(1) ATPase particle is the largest asymmetric structure solved to date. Isomorphous differences arising from reacting the crystals with methyl-mercury nitrate at two concentrations allowed the structure determination. Careful data collection and data processing were essential in this process as well as a new form of electron-density modification, 'solvent flipping'. The most important feature of this new procedure is that the electron density in the solvent region is inverted rather than set to a constant value, as in conventional solvent flattening. All non-standard techniques and variations on new techniques which were employed in the structure determination are described. FAU - Abrahams, J P AU - Abrahams JP AD - MRC Laboratory of Molecular Biology, Cambridge, England. FAU - Leslie, A G AU - Leslie AG LA - eng PT - Journal Article PL - Denmark TA - Acta Crystallogr D Biol Crystallogr JT - Acta crystallographica. Section D, Biological crystallography JID - 9305878 EDAT- 1996/01/01 00:00 MHDA- 1996/01/01 00:01 CRDT- 1996/01/01 00:00 AID - 10.1107/S0907444995008754 [doi] AID - S0907444995008754 [pii] PST - ppublish SO - Acta Crystallogr D Biol Crystallogr. 1996 Jan 1;52(Pt 1):30-42.