Defined in file ncbimime.asn C++ class: CNcbi_mime_asn1 Ncbi-mime-asn1 ::= CHOICE { entrez Entrez-general, -- just a structure alignstruc Biostruc-align, -- structures & sequences & alignments alignseq Biostruc-align-seq, -- sequence alignment strucseq Biostruc-seq, -- structure & sequences strucseqs Biostruc-seqs, -- structure & sequences & alignments general Biostruc-seqs-aligns-cdd -- all-purpose "grab bag" -- others may be added here in the future }