def clean_accession(rec_id):
return rec_id.rsplit('<STR_LIT:/>', <NUM_LIT:1>)[<NUM_LIT:0>]<EOL>
Extract an accession key from one SeqRecord.

    The id of the given record is processed to remove domain location info
    added by HMMer. Most other records won't have a '/' character in the FASTA
    header key.