The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
absence of the photoreceptor region which contains the machinery of the cell (mitochondria, golgi, endoplasmic reticulum, etc) and where opsin molecules are assembled and passed to be part of the outer segment region