Your Query returns 77 Accession Numbers:

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

Gene/Allele	Accession	NCBI Taxonid	Synonyms
Opa	NM_164771	7227	tld-like anon-28Cg
Opa	NT_033779	7227	tld-like anon-28Cg
opa	U17295	727
opa	S78339	7242
opa	AF001179	487	opaJ101
opa	AF001180	487	opaA132
opa	AF001181	487	opaA99
opa	AF001182	487	opaA98
opa	AF001183	487	opaA96
opa	AF001184	487	opaA97
opa	AF001185	487	opaB133
opa	AF001186	487	opaB118
opa	AF001187	487	opaB136
opa	AF001188	487	opaB138
opa	AF001189	487	opaD137
opa	AF001190	487	opaD119
opa	AF001191	487	opaD117
opa	AF001192	487	opaB135
opa	AF001193	487	opaD134
opa	AF001194	487	opaD131
opa	AF001195	487	opaD100
opa	AF001196	487	opaD91
opa	AF001197	487	opaA105
opa	AF001198	487	opaA115
opa	AF001199	487	opaB92
opa	AF001200	487	opaB93
opa	AF001201	487	opaB94
opa	AF001202	487	opaB90
opa	AF001203	487	opaB5202
Opa	AF018078	7227
opa	U37255	487
opa	U37256	487
opa	U37257	487
opa	U77881	487
opa	AF016285	487
opa	AF016286	487
opa	AF016287	487
opa	AF016288	487
opa	AF016289	487
opa	AF016290	487
opa	AF016291	487
opa	AF016292	487
opa	AY051783	7227
opa	AE006143	747	PM1025
opa	AF031333	487	DIII
opa	AF031334	487	D109
opa	AF031335	487	D108
opa	AF031336	487	D110
opa	AF031337	487	B114
opa	AF031338	487	A114
opa	AF031339	487	A103
opa	AF031340	487	B122
opa	AF031341	487	B120
opa	AF031342	487	B140
opa	AF031343	487	A106
opa	AF031344	487	B116
opa	AF031345	487	J107
opa	AF031346	487	D112
opa	AF031347	487	B139
opa	AF031348	487	A121
opa	AF031349	487	B113
opa	AJ292235	487
opa	AJ292236	487
opa	AJ292237	487
opa	AJ292238	487
opa	AF001204	487	opaB102
opa	NC_002663	747
opa	AE003604	7227
opa	AJ288888	486
opa	AJ288889	486
opa	AJ288890	486
opa	AJ288891	486
opa	AJ288892	486
opa	AJ288893	486
opa	AJ288894	28449
opa	NM_079504	7227	CG1133
opa	NT_033777	7227	CG1133

Text2Knowledge ... Yong Huang 2002