1.   Infigen Inc., the Wisconsin company, is one of only a few groups worldwide to have successfully cloned piglets.

2.   A team led by Japanese and American researchers announced in the journal Science that a single piglet had been cloned.

3.   Two research teams announced this week that they have cloned piglets that were genetically modified to help prevent their organs being rejected if they were transplanted into a human.

4.   Two research teams announced this week that they have cloned piglets that lack one of two genes that prompt the human immune system to reject swine tissue.

5.   British scientists who cloned the sheep Dolly have cloned piglets whose organs could be used in human transplants, PPL Therapeutics said Wednesday.

6.   PPL said Wednesday it had cloned five piglets and deactivated the gene in question, placing the two teams in direct competition.