Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Psmc2BC0531877955MGC63995    zgc:63995   
Psmc2BC0541438355xMSS1   
Psmc2NM_2009667955MGC63995    zgc:63995   
Psmc2NM_01118810090154365
Psmc2NW_04768710116
Psmc2NM_03323610116MSS1   
PSMC2BC0025899606MSS1    S7    MGC3004    154365
PSMC2AC0937019606154365
PSMC2AY4070949606154365
PSMC2AY4070959598
PSMC2AY40709610090154365
PSMC2NM_0028039606S7    MSS1    MGC3004    154365
Psmc2NT_03929910090154365
Psmc2BC00546210090154365
Psmc2BC06154210116MSS1   
PSMC2G183349606154365
PSMC2NT_0079339606154365
PSMC2NT_0795969606154365

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

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Text2Knowledge ... Yong Huang 2002