The International Society of Differentiation: Past, present, and future.

The International Society of Differentiation was born from the First International Conference on Cell Differentiation conceived by D.V. and held in Nice, France in 1971.

Genome sequences of two frog herpesviruses.

The sequences of two frog herpesviruses, Ranid herpesvirus 1 and Ranid herpesvirus 2, were determined. They are respectively 220 859 and 231 801 bp in size and contain 132 and 147 predicted genes. The genomes are related most closely in the central regions, where 40 genes are conserved convincingly.

The golden anniversary of cloning: a celebratory essay.

May 2002 marked the golden anniversary of the first cloned tadpoles. We celebrate this anniversary, as nuclear transplantation of frog cells into enucleated eggs became the prototype for cloning insects, fish, and mammals. We briefly review the salient results from amphibian cloning.

Cloning of Homo sapiens? No!

Animal cloning by nuclear transplantation was first developed in the northern leopard frog, Rana pipiens. It was soon extended to other amphibian species and within time, to various mammalian species. The production of a cloned sheep (Dolly) from an adult nuclear donor reawakened interest in human cloning.