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 Results for DC.creator="A." AND DC.creator="McPherson" in section 4.1.2 of volume F
Purity and homogeneity
Sauter, C., Lorber, B., McPherson, A. and Giegé, R.  International Tables for Crystallography (2012). Vol. F, Section 4.1.2.4, pp. 103-104 [ doi:10.1107/97809553602060000812 ]
... alter macromolecular solubility, or interfere with nucleation and crystal growth (McPherson et al., 1996, 2004; Moreno et al., 2005; Thomas et ... causes are partial hydrolysis and post-synthetic modifications. Proteolysis represents a major difficulty that must be overcome during protein isolation. In ... such subtle degradations or modifications explain why altered versions of a macromolecule can be the worst contaminants for its crystallization. ...

Additives
Sauter, C., Lorber, B., McPherson, A. and Giegé, R.  International Tables for Crystallography (2012). Vol. F, Section 4.1.2.3, pp. 102-103 [ doi:10.1107/97809553602060000812 ]
... success of protein crystallization. Additives, as they are often called (McPherson, 1982, 1999; Sauter, Ng et al., 1999), can be decisive ... be treated as almost entirely separate problems. This may permit a new opportunity for growing crystals if the native molecule is ... or secure formation of the lattice. Such molecules sometimes had a physiological basis for their unexpected presence, but frequently not. ...

Physical, physical-chemical and biochemical variables
Sauter, C., Lorber, B., McPherson, A. and Giegé, R.  International Tables for Crystallography (2012). Vol. F, Section 4.1.2.2, pp. 101-102 [ doi:10.1107/97809553602060000812 ]
... biochemical variables Many physical, chemical and biological variables influence, to a greater or lesser extent, the crystallization of macromolecules (Fig. 4.1.1.1 ... to molecules that differ by no more than one or a few residues. Therefore one can hardly predict in advance the specific values of a variable or sets of conditions that might be most ...

Crystallizing agents
Sauter, C., Lorber, B., McPherson, A. and Giegé, R.  International Tables for Crystallography (2012). Vol. F, Section 4.1.2.1, pp. 100-101 [ doi:10.1107/97809553602060000812 ]
... defined as those chemical species that are able to precipitate a soluble macromolecule and hence to bring it into a supersaturated state needed for its crystallization. They fall into four ... iv) low-molecular-mass polymers and non-volatile organic compounds (McPherson, 1990). The first two classes are typified by ...

Main parameters that affect crystallization of macromolecules
Sauter, C., Lorber, B., McPherson, A. and Giegé, R.  International Tables for Crystallography (2012). Vol. F, Section 4.1.2, pp. 100-104 [ doi:10.1107/97809553602060000812 ]
... defined as those chemical species that are able to precipitate a soluble macromolecule and hence to bring it into a supersaturated state needed for its crystallization. They fall into four ... iv) low-molecular-mass polymers and non-volatile organic compounds (McPherson, 1990). The first two classes are typified by ...

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