Your Query returns 23 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Rab27aNM_02363510090ash    2210402C08Rik    2410003M20Rik    4933437C11Rik    603868
RAB27AAH0080599606603868
RAB27AAF1548359606603868
RAB27AAF1548369606603868
RAB27AAF1548379606603868
RAB27AAF1548389606603868
RAB27AAF1548399606603868
RAB27AAF1548409606603868
RAB27AAY4182369606603868
RAB27AAY4182379598
RAB27AAY41823810090603868
RAB27AAF4989539606603868
RAB27AAF4438719606603868
rab27aAB12051110090603868
Rab27aNT_03947410090603868
Rab27aAF30437610090603868
Rab27aBC008173100904933437C11Rik    2210402C08Rik    603868
Rab27aBC009656100904933437C11Rik    2210402C08Rik    603868
RAB27ANM_1832369606GS2    RAM    RAB27    HsT18676    603868
RAB27ANM_0045809606GS2    RAM    RAB27    HsT18676    603868
RAB27ANM_1832349606GS2    RAM    RAB27    HsT18676    603868
RAB27ANM_1832359606GS2    RAM    RAB27    HsT18676    603868
RAB27ANT_0101949606603868

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

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Text2Knowledge ... Yong Huang 2002