Table 1.

Timing of morphological and biochemical changes in the unfertilized Xenopus eggs deposited into different buffers.

Egg environment	Change in egg morphology	Meiotic exit	Caspase acti- vation	Increase in egg diameter
Water (j)	within 6 h	within 12 h	18-36 h	12-18 h
DB buffer (d)	within 12 h	within 18 h	24-36 h	24-36 h
OR-2 (j)	within 12 h	within 18 h	30-48 h	24-36 h
OR-2 (d)	within 12 h	within 18 h	24-36 h	24-36 h

(d) and (j) denote dejellied and jelly-coated eggs, respectively.