Chains and heterogens:
PDB Chain Sequences:
>1fnf_ (-) plspptnlhleanpdtgvltvswersttpditgyritttptngqqgnsleevvhadqssc tfdnlspgleynvsvytvkddkesvpisdtiipavppptdlrftnigpdtmrvtwappps idltnflvryspvkneedvaelsispsdnavvltnllpgteyvvsvssvyeqhestplrg rqktgldsptgidfsditansftvhwiapratitgyrirhhpehfsgrpredrvphsrns itltnltpgteyvvsivalngreesplligqqstvsdvprdlevvaatptslliswdapa vtvryyritygetggnspvqeftvpgskstatisglkpgvdytitvyavtgrgdspassk pisinyrt