>3sm4A (A:) observed residues (from ATOM records)
tpdiilqrtgidvraveqgddawhklrlgvitasevhnviakprsgkkwpdmkmsyfhtl
laevctgvapevnakalawgkqyendartlfeftsgvnvtespiiyrdesmrtacspdgl
csdgnglelacpftsrdfmkfrlggfeaiksaymaqvqysmwvtrknawyfanydprmkr
eglhyvvierdekymasfdeivpefiekmdealaeigfvfgeqwr