SHE is the one who told me about these cats.... so I thought I would include the information, in case anyone out there is also so allergic they've been deprived of having a pet.  There's a price to pay, but the companionship of an animal itself is priceless!

"There is a protein in the feline saliva called FEL D-1. When the cat cleans itself, the protein then dries on the fur leaving dander.  The dander particles are small and air filters cannot remove them from the air. The Siberian is void of the FEL D1 protein, therefore no dander." 

Are studies being done on the non-allergic fur?

"No official study has been commissioned to date. I am in the process of contacting universities that specialize in allergies in the hopes that one of them will be interested to doing such a study.
About two years ago, I sold two Siberians to an asthmatic. Because of his asthma, Ernie makes regular visits to the Mayo clinic. He informed them of his Siberians. The Mayo clinic has  been using Ernie as their guinea pig, running test after test to make him react to Siberian dander. They have failed miserably,  since there is no dander. The doctors still find it unbelievable but
are starting to be convinced."