Hi, Thanks for making the correction. If I might, I'd like to note that actually the paper in question is Napoli et al., not Jorgensen et al. I've received plenty of credit but Carolyn gets forgotten, so please refer to the paper as Napoli et al. It's Carolyn Napoli, Christine Lemieux and me. 1990. You can find a free copy, with petunia photos, original cosuppression RNase protection experiment, etc., in The Plant Cell: http://www.plantcell.org/cgi/content/abstract/2/4/ 279 You can also find a link to this paper at my web site, along with links to a short Nova video that explains RNAi beautifully and simply: http://ag.arizona.edu/pls/faculty/jorgensen.html?& index=8#pubs I guess I should clarify that "it wasn't immediately clear it was the same thing as RNAi" because this was 1990 and RNAi was discovered in 1996/7 and published in 1998. RNA silencing was a small field for a long time before RNAi came along and got the whole scientific community excited about it. It was truly a monumental discovery - double-stranded RNA as the key to RNA silencing - and more than worthy of a Nobel. Hats off to Andy and Craig. Rich Jorgensen