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Structure of PDB 4xn4 Chain A Binding Site BS04

Receptor Information
>4xn4 Chain A (length=866) Species: 83333 (Escherichia coli K-12) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
PQAKYRHDYRAPDYQITDIDLTFDLDAQKTVVTAVSQAVRHGASDAPLRL
NGEDLKLVSVHINDEPWTAWKEEEGALVISNLPERFTLKIINEISPAANT
ALEGLYQSGDALCTQCEAEGFRHITYYLDRPDVLARFTTKIIADKIKYPF
LLSNGNRVAQGELENGRHWVQWQDPFPKPCYLFALVAGDFDVLRDTFTTR
SGREVALELYVDRGNLDRAPWAMTSLKNSMKWDEERFGLEYDLDIYMIVA
VDFFNAGAMENKGLNIFNSKYVLARTDTATDKDYLDIERVIGHEYFHNWT
GNRVTCRDWFQLSLKEGLTVFRDQEFSSDLGSRAVNRINNVRTMRGLQFA
EDASPMAHPIRPDMVIEMNNFYTLTVYEKGAEVIRMIHTLLGEENFQKGM
QLYFERHDGSAATCDDFVQAMEDASNVDLSHFRRWYSQSGTPIVTVKDDY
NPETEQYTLTISQRTPATPDQAEKQPLHIPFAIELYDNEGKVIPLQKGGH
PVNSVLNVTQAEQTFVFDNVYFQPVPALLCEFSAPVKLEYKWSDQQLTFL
MRHARNDFSRWDAAQSLLATYIKLNVARHQQGQPLSLPVHVADAFRAVLL
DEKIDPALAAEILTLPSVNEMAELFDIIDPIAIAEVREALTRTLATELAD
ELLAIYNANYQSEYRVEHEDIAKRTLRNACLRFLAFGETHLADVLVSKQF
HEANNMTDALAALSAAVAAQLPCRDALMQEYDDKWHQNGLVMDKWFILQA
TSPAANVLETVRGLLQHRSFTMSNPNRIRSLIGAFAGSNPAAFHAEDGSG
YLFLVEMLTDLNSRNPQVASRLIEPLIRLKRYDAKRQEKMRAALEQLKGL
ENLSGDLYEKITKALA
Traceback (most recent call last):
  File "/var/www/html/BioLiP/pdb.cgi", line 1465, in <module>
    pubmed,uniprot=display_interaction(pdbid,asym_id,bs,title)
  File "/var/www/html/BioLiP/pdb.cgi", line 903, in display_interaction
    with open('./pdb_cgi_debug.log', 'a') as f:
PermissionError: [Errno 13] Permission denied: './pdb_cgi_debug.log'