>4bttB (B:) SEQRES residues
ivggqeckdgecpwqallineenegfcggtilsefyiltaahclyqakrfkvrvgdrnte
qeeggeavhevevvikhnrftketydfdiavlrlktpitfrmnvapaclperdwaestlm
tqktgivsgfgrthekgrqstrlkmlevpyvdrnscklsssfiitqnmfcagydtkqeda
cqgdsggphvtrfkdtyfvtgivswgegcarkgkygiytkvtaflkwidrsmktrglpka
kshapevitssplk