Your Query returns 11 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Actr2NM_14624310090MGC36604    D6Ertd746e    4921510D23Rik   
ACTR2BC0145469606ARP2   
ACTR2BC0362539606ARP2   
ACTR2AY4093629606
ACTR2AY4093639598
ACTR2AY40936410090
ACTR2NM_0057229606ARP2   
Actr2NT_03951510090
Actr2BC04753010090MGC36604    D6Ertd746e   
Actr2BC02779910090MGC36604   
ACTR2NT_0221849606

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

Google

Text2Knowledge ... Yong Huang 2002