title: Cinematographic observation of an "activation wave" (AW) on the locally inseminated egg ofXenopus laevis.
abstract: Shortly after local artificial insemination, but well before egg rotation,Xenopus eggs show a wave-like propagation of dark-light-dark zones from the site of sperm entrance. This presumably reflects the movement of the front of cortical granule breakdown.
authors.affiliation: Hubrecht Laboratory, Universiteitscentrum "De Uithof", Uppsalalaan 8, Ultrecht, The Netherlands.
authors.forename: Koki
authors.initials: K
authors.lastname: Hara
authors.affiliation: Hubrecht Laboratory, Universiteitscentrum "De Uithof", Uppsalalaan 8, Ultrecht, The Netherlands.
authors.forename: Peter
authors.initials: P
authors.lastname: Tydeman
keywords: Fertilization; Surface wave; Time-lapse cinematography; Xenopus egg