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.
If you do not test within these dates you will have to reregister and repay the examination fee. The ATT contains your authorization number, candidate identification number and an expiration date. You need the ATT to: Schedule an appointment to take the NCLEX examination.
1 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. 2  Call NCLEX Candidate Services if you've lost your ATT or if you have not received your ATT two weeks after registering.