>2ckrB (B:) observed residues (from ATOM records)
gtpverygkvqvcgtqlcdehgnpvqlrgmsthgiqwfdhcltdssldalaydwkadiir
lsmyiqedgyetnprgftdrmhqlidmatarglyvivdwhiltpgdphynldraktffae
iaqrhasktnvlyeianepngvswasiksyaeevipvirqrdpdsviivgtrgwsslgvs
egsgpaeiaanpvnasnimyafhfyaashrdnylnalreaselfpvfvtqfgtetytgdg
andfqmadryidlmaerkigwtkwnysddfrsgavfqpgtcasggpwsgsslkasgqwvr
sklqs