I also have the N1303K gene that has severely affected my pancreas, & is also affecting my digestive system. They have not identified the other gene.
I just posted some information about this gene on the "Newly Diagnosed" forum, if you want to check it out.
If you go to the NIH website, along with other gov't & nonprofit research websites, you'll find a lot of info on this gene.
Right now, the only meds that have given me some relief are pancreatic enzymes (1st Creon, then swithced to Zenpep), lomotol for symptons, & Prandin oral med for CFR Diabetes. But I'm still having digestive problems that the Dr's haven't figured out yet.
If at all possible, find a GI w/pancreas & CF experience.