one- and three-letter codes

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     The following was sent to the mmCIF list in July, 1996 and again in
August, 1996 because of some apparent mailing problem.  I have just looked
at the new mmCIF dictionary and am puzzled why this was not addressed in
the new release.

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    The list of three-letter codes for amino acids includes
ASX  'ambiguous asparagine/aspartic-acid' but it is missing the
corresponding GLX 'ambiguous glutamine/glutamic acid'.

    The list of one-letter codes for amino acids is missing both
B which corresponds to ASX and Z which corresponds to GLX.
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                                  Sincerely,
                                  Frances C. Bernstein

-- 
Frances Bernstein

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