Table 1. Summary of mouse strains carrying Cre expression targeted to male germ cells.

Mouse strain	Target cells	References
Prm1-Cre	Haploid spermatid	O'Gorman et al. (1997)
	Haploid spermatid, sterile	Schmidt et al. (2000)
c-Kit-Cre	Germ cells; ubiquitous deletion during embryogenesis	Bergqvist et al. (1998)
Sycp1-Cre	Primary spermatocytes	Vidal et al. (1998)
Pgk2-Cre	Spermatocytes	Ando et al. (2000)
	Spermatocytes; Ectopic expression during embryogenesis	Bhullar et al. (2001)
TNAP-Cre	Primordial germ cells	Lomeli et al. (2000)
PGK-1-Cre	Diploid primordial germ cells	Lallemand et al. (1998)