>5k09S (S:) observed residues (from ATOM records)
gdtkeqrilryvqqnakpgdpqsvleaidtyctqkewamnvgdakgqimdavireyspsl
vlelgaycgysavrmarllqpgarlltmeinpdcaaitqqmlnfaglqdkvtilngasqd
lipqlkkkydvdtldmvfldhwkdrylpdtllleecgllrkgtvlladnvivpgtpdfla
yvrgsssfecthyssyleymkvvdglekaiyqgps