I was poking around the Nova website looking for information on the Ghost in your genes show and found this 16 part show -- #9 & 10 specifically relate to the genetics of CF -- if you have time watch the entire thing -- it's very good.... it goes into the specifics of proteins being more important than just gene mutations in determining the course of disease.
<a target=_blank class=ftalternatingbarlinklarge href="http://www.pbs.org/wgbh/nova/genome/program.html">http://www.pbs.org/wgbh/nova/genome/program.html</a>
<a target=_blank class=ftalternatingbarlinklarge href="http://www.pbs.org/wgbh/nova/genome/program.html">http://www.pbs.org/wgbh/nova/genome/program.html</a>