Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Clk1NM_00990510090STY    Clk    601951
CLK10N/ACMK3    RCK2   
CLK1U234644932
clk1AF0003095458
clk1L292199606601951
clk1L292229606601951
CLK1BC0315499606CLK    STY    601951
CLK1NM_0040719606CLK    STY    601951
CLK1NT_0054039606601951

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

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Text2Knowledge ... Yong Huang 2002