>4bx2A (A:) observed residues (from ATOM records)
gmarcerlrgaalrdvlgqaqgvlfdcdgvlwngerivpgapellqrlaragkntlfvsn
nsrrarpelalrfarlgfaglraeqlfssalcaarllrqrlpgppdasgavfvlggeglr
aelraaglrlagdpgedprvravlvgydeqfsfsrlteacahlrdpdcllvatdrdpwhp
lsdgsrtpgtgslaaavetasgrqalvvgkpspymfqcitedfsvdpartlmvgdrletd
ilfghrcgmttvltltgvssleeaqayltagqrdlvphyyvesiadlmegle