>1z7xZ (Z:) observed residues (from ATOM records)
esrakkfqrqhmdsdsspsssstycnqmmrrrnmtqgrckpvntfvheplvdvqnvcfqe
kvtckngqgncyksnssmhitdcrltngsrypncayrtspkerhiivacegspyvpvhfd
asveds