he Na,K-ATPase or sodium pump is an enzyme that is found in most animal cells. The enzyme pumps sodium and potassium ions against their concentration gradients and is hypothesized to be a mediator of fluid accumulation during mouse preimplantation development. The purpose of the present study was to determine, using reverse transcriptase-polymerase chain reaction (RT-PCR), whether all ;;;Using antisense oligodeoxynucleotides (ODNs), ;Sodium pump gene expression was also examined in another mammalian species, the horse, to provide further evidence that the enzyme is a mediator of mammalian blastocyst development. |