Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MCL1LBC0171979606EAT    MCL1S    MGC1839    TM    MCL1   
MCL1LNM_0219609606TM    EAT    MCL1S    MGC1839    MCL1   
MCL1LNM_1827639606TM    EAT    MCL1S    MGC1839    MCL1   
mcl1lNM_1943987955NR-13   

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

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Text2Knowledge ... Yong Huang 2002