>4np4M (M:) observed residues (from ATOM records)
eivltqspgtlslspgeratlscrasqsvsssylawyqqkpgqaprlliygassratgip
drfsgsgsgtdftltisrlepedfavyycqqygsstwtfgqgtkveikrtvaapsvfifp
psdeqlksgtasvvcllnnfypreakvqwkvdnalqsgnsqesvteqdskdstyslsstl
tlskadyekhkvyacevthqglsspvtksfnrg