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Figure 2
A representative sample of ammonium sulfate spelling alternatives from the Protein Data Bank. Some forms are clear misspellings, some are valid alternative spellings and some are more insidious (such as substituting a zero for an `O'). Many are abbreviations that may or may not be commonly used by crystallographers and crystallizers around the world.

Journal logoBIOLOGICAL
ISSN: 1399-0047
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