>3mtnC (C:) observed residues (from ATOM records)
ghvglrnlgntcflnavlqclsstrplrdfclrrdfrqevpgggraqelteafadvigal
whpdsceavnptrfravfqkyvpsfsgysqqdaqeflkllmerlhleinrrsdddranlm
wkryleredskivdlfvgqlksclkcqacgyrsttfevfcdlslpipkkgfgkvslrdcf
nlftkeeelesenapvcdrcrqktrstkkltvqrfprilvlhlnrfsasrgsikkssvgv
dfplqrlslgdfasspvyqlyalcnhsgsvhyghytalcrcqtgwhvyndsrvspvsenq
vassegyvlfyqlm