Your Query returns 14 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Gucy1b3NM_01746910090GC-S-beta-1    139397
Gucy1b3NW_04762610116
GUCY1B3BC0476209606GC-SB3    GUC1B3    GUCSB3    GC-S-beta-1    GUCB3    139397
GUCY1B3AY4139409606139397
GUCY1B3AY4139419598
GUCY1B3AY41394210090139397
GUCY1B3AY0347789606139397
GUCY1B3NM_0008579606GUCB3    GC-SB3    GUC1B3    GUCSB3    GC-S-beta-1    139397
GUCY1B3NM_1746419913
Gucy1b3NT_07838410090139397
Gucy1b3BC05094510090GC-S-beta-1    139397
Gucy1b3BC05699510090GC-S-beta-1    139397
GUCY1B3NT_0166069606139397
Gucy1b3NM_01276910116SGC    Gucy1b1   

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

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Text2Knowledge ... Yong Huang 2002