Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mphosph6NM_026758100901110001M01Rik    605500
MPHOSPH6BC0052429606MPP-6    MPP6    MPP    605500
MPHOSPH6BC0110209606MPP-6    MPP6    MPP    605500
MPHOSPH6BC0310179606MPP-6    MPP6    MPP    605500
MPHOSPH6BC0293959606MPP-6    MPP6    MPP    605500
MPHOSPH6AY4179039606605500
MPHOSPH6AY4179049598
MPHOSPH6AY41790510090605500
MPHOSPH6NM_0057929606MPP    MPP6    MPP-6    605500
Mphosph6NT_07857510090605500
Mphosph6BC00816110090605500
MPHOSPH6NT_0247979606605500

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

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Text2Knowledge ... Yong Huang 2002