There are two models of protein folding that are currently being confirmed: 1  The diffusion collision model, in which a nucleus is formed, then the secondary structure is formed, and finally these secondary structures are collided together and pack tightly together.
ATT Validity Dates. 1  Each ATT is valid for a period of time specified by the BON/RB (the average length of an ATT is 90 days). 2  Once the BON/RB has declared you eligible to test and you receive your ATT, you must test within the validity dates on the ATT.
Sep 5, '06. The NCSBN did a study indicating that NCLEX test-takers have an 80 percent chance of passing if the exam is taken within 60 days of graduation. If you flip the coin, the chances of passing drop to 44 percent if you wait over 60 days to take NCLEX. Don't wait! Get it over with!