standards for structural communications - sequence

The complete sequence of the molecule crystallized should be provided.

This may take the form of a database code to indicate the canonical sequence, but it should include sequences and attachment points of any tags or remnants of tags and any known covalent modifications. In the case that the preparation and purification steps have been previously published and a paper containing their description is cited, the authors should provide a brief summary of the key aspects of sample preparation that makes the final sequence clear to readers.