>4k5uB (B:) observed residues (from ATOM records)
acpsqcscsgtevncagkslasvpagiptttrvlylnsnqitklepgvfdrlanlrelhl
wgnqlvslppgvfdnlanleklwlnsnqltslpaglfdrlvnlehlglccmkltelpsga
fdkltrlkqlgldqnqlksipdgafarlpslthvwlhtnpwdcqctdilylsgwvaqhss
ivgegwpwrhspdsakcsgtntpvravteastspskcp