51 52 53 The oocytes of many species, both invertebrate and vertebrate, contain a large 54 collection of localized determinants in the form of proteins and translationally inactive 55 maternal mRNAs. However, it is unknown whether mammalian oocytes contain 56 localized mRNA determinants and what mechanisms might be responsible for their 57 control. We find by cDNA microarray analysis enrichment...