Protein Content of the Mouse Embryo During the First Five Days of Development

Summary. The protein content of the mouse embryo decreases from 27·77 ng at the one-cell stage to 20·58 ng at the morula stage. This is approximately a 25% decrease during the first 3 days of development. After the morula stage, the decrease in protein content stops, and there appears to be an increase in total protein with blastocyst formation.