>2a1aB (B:) observed residues (from ATOM records)
gahtvdkrfgmdfkeieligsggfgqvfkakhridgktyvikrvkynnekaerevkalak
ldhvnivhyngcwdgfdydpetssrsktkclfiqmefcdkgtleqwiekrrgekldkvla
lelfeqitkgvdyihskklinrdlkpsniflvdtkqvkigdfglvtslkndgkrtrskgt
lrymspeqissqdygkevdlyalglilaellhvcdtafetskfftdlrdgiisdifdkke
ktllqkllskkpedrpntseilrtltvwkk