An examination of the top results indicates you will find better matches by using the CONTAINED_IN search type along with ALL_ALIGNED search mode. However, the absence of this message does not imply you will not see better matches when using the the suggested search type and mode.
Please wait while your results are obtained: Fast Mode ~ 1 min, Top-Aligned ~ 2 min, All-Aligned ~ 3 min
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If you just executed a search, check that the structure id is correct or that the structure was not recently submitted to the PDB. Chain identifiers for structure ids other than SCOPe ids are case sensitive. Of course, enter only one structure id at a time.