Your Query returns 27 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MaSp2AF350263156844
MaSp2AF350267156845
MaSp2AF350272156850
MaSp2AF350274156851
MaSp2AF350275156851
MaSp2AF350278115969
MaSp2AF350280156852
MASP2AB0337429606sMAP    605102
Masp2XM_34297710116
Masp2NW_04772710116
MASP2AJ2979499606605102
MASP2AJ2997189606605102
MASP2AH0102299606605102
MASP2AF3215589606605102
MASP2AF3215599606605102
MASP2AF3215609606605102
MASP2AF3215619606605102
MASP2AF3215629606605102
MASP2NM_0066109606sMAP    MAP19    605102
MASP2NM_1392089606sMAP    MAP19    605102
Masp2XM_35835310090605102
Masp2NT_03926810090605102
Masp2XM_35941310090605102
Masp2NT_03928910090605102
masp2AJ54253810116
Masp2BC01389310090MAp19    MASP-2    605102
MASP2NT_0219379606605102

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

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Text2Knowledge ... Yong Huang 2002