>6fckA (A:) observed residues (from ATOM records)
avpfvedwdlvqtlgegaygevqlavnrvteeavavkivdmkravdcpenikkeicinkm
lnhenvvkfyghrregniqylfleycsggelfdriepdigmpepdaqrffhqlmagvvyl
hgigithrdikpenlllderdnlkisdfglatvfrynnrerllnkmcgtlpyvapellkr
refhaepvdvwscgivltamlagelpwdqpsdscqeysdwkekktylnpwkkidsaplal
lhkilvenpsaritipdikkdrwynkplk