Griff, I did, after some searching, find the article that was mentioned at Norma's website. One thing struck me while reading the information on her site was that they stated that people with CF "lacked chloride channels altogether" and that carriers only had "half as many chloride channels" Then I noticed the date of the article which was sometime in 1995. The Estivill research was in 1994 and the Gabriel research seems to have followed soon after. In any case that goes to show that you can't believe everything that you read on the internet. We've learned quite a lot since 1995. In 2001 or 2002 they realized that they had the movement of the Cl- ion across the membrane backward. I'm still looking for that Pubmed article, but it is difficult finding data from that long ago.
In any case the age of the CF gene was estimated based on an extrapolation of the number of mutations and the estimated rate of mutation. I'm still not saying it's wrong, but it's also far from immune to error.
I think my views are generally realistic, rather then pessimistic. But that's my opinion and in cases like this I like to stick to fact rather than opinion. We can throw around opinions until the next cholera pandemic and still get nothing resolved.
Honestly, it was not my intention to put you on the defensive. It was an interesting read and I was truly curious where that information came from.
In any case the age of the CF gene was estimated based on an extrapolation of the number of mutations and the estimated rate of mutation. I'm still not saying it's wrong, but it's also far from immune to error.
I think my views are generally realistic, rather then pessimistic. But that's my opinion and in cases like this I like to stick to fact rather than opinion. We can throw around opinions until the next cholera pandemic and still get nothing resolved.
Honestly, it was not my intention to put you on the defensive. It was an interesting read and I was truly curious where that information came from.