>5tk3A (A:) observed residues (from ATOM records)
sgyglpisqevakelaenarkiaapgkgilaadestgtikkrfdsigventeanrafyrd
llfstkglgqyisgailfeetlyqkspsgvpmvdllkaegiipgikvdkgletlpltdde
katmgldglserckkyyeagarfakwravlsidpakgkptnlsitevahglaryaaicqa
nrlvpivepeiltdgshditvcaevtervlaavfkalndhhvllegallkpnmvthgsdc
pkpasheeiafytvrslkrtvppalpgvmflsggqseedaslnlnemnkmgphpfqlsfs
ygralqasclkawkgvpenkakaqqvlmerarangeaqlgkygggayvy