Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
acnMBX640418257313acn    acnA   
acnMBX640433519acn    acnA   
acnMBX640448257310acn    acnA   
acnMNC_002927257310acn    acnA   
acnMNC_002929257313acn    acnA   
acnMNC_002928257311acn    acnA   
acnMAF325554510
acnMAY033092159450

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

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Text2Knowledge ... Yong Huang 2002