CZ:Ref:DOI:10.1038/nature05453

Lein, Ed S.; Michael J. Hawrylycz & Nancy Ao et al. (2007), "Genome-wide atlas of gene expression in the adult mouse brain", Nature 445 (7124): 168–176, DOI:10.1038/nature05453 ^[e]

Provides a brief description of The Allen Brain Atlas of the adult mouse brain (strain C57BL/6J) - "a genome-scale collection of cellular resolution gene expression profiles using in situ hybridization" of over 20,000 genes (i.e. most mouse genes then known to encode proteins). Also reports that "approximately 80% of total genes assayed display some cellular expression above background in the brain."