Table 1.

Survival of and expression in growing mouse oocytes after cDNA microinjection

cDNA injected	No. oocytes injected	Time of cuture (h)	% survival	% expressinga
	357	21–23	98	51
Myc-mZP2	295	43–48	96	85
	246	72	92	73
	200	21–24	99	82
Flag-mZP3	292	44–50	95	96
	210	72	95	ndb

^a Percentage of oocytes expressing recombinant ZP glycoprotein. 

^b nd, not determined.