^ abcGRCh38: Ensembl release 89: ENSG00000188394 – Ensembl, May 2017
^ abcGRCm38: Ensembl release 89: ENSMUSG00000053164 – Ensembl, May 2017
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Entrez Gene: GPR21 G protein-coupled receptor 21".
Further readingedit
O'Dowd BF, Nguyen T, Jung BP, et al. (1997). "Cloning and chromosomal mapping of four putative novel human G-protein-coupled receptor genes". Gene. 187 (1): 75–81. doi:10.1016/S0378-1119(96)00722-6. PMID 9073069.
Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC139241. PMID 12477932.
Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC528928. PMID 15489334.