... of activin mRNA fall dramatically on differentiation. * Author for correspondence 26 10 1992 © 1993 by Company of Biologists 1993 mouse preimplantation embryos ES cells activin inhibin This paper considers the expression patterns of the activins in early mouse...

..., The Ridgeway, Mill Hill, London NW7 1AA, UK 24 09 1992 © 1993 by Company of Biologists 1993 preimplantation embryos XX-XY differences preimplantation Y chromosome effect It has become apparent from a number of lines of evidence that, in mammals, there are some phenotypic...

.... A microassay for methylase activity in preimplantation embryos shows that the level of maternally inherited enzyme is extremely high in the egg and that this activity is stable for the first three cleavage divisions. However, from the 8-cell to the blastocyst stage, there is a marked and absolute decrease...

... indicated, the Kodak X-Omat XR-5 film was preflashed according to the method of Laskey & Mills (1975) in order to generate a linear relationship between spot optical density and protein concentration. The synthesis of p63/6.9 by preimplantation embryos was examined by in vitro labelling...