Your Query returns 20 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
exo1AF29203128104
exo1AF366292159251
exo1AB0031055528
EXO1U861344932
exo1L351744896
exo1AL0344634896SPBC29A10.05   
exo1AF4940144787
Exo1NM_01201210090Msa    606063
EXO1AF5491689606606063
EXO1BC0074919606HEX1    hExoI    606063
EXO1AF0604799606606063
EXO1NM_1303989606HEX1    hExoI    606063
EXO1NM_0036869606HEX1    hExoI    606063
EXO1NM_0060279606HEX1    hExoI    606063
Exo1NT_03918610090606063
Exo1AJ23821310090606063
Exo1BC00667110090Msa    606063
exo1NC_0034234896SPBC29A10.05   
EXO1NT_0048369606606063
EXO1NC_0011474932DHS1   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002