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.
An applicant must have worked within the 4 years preceding the filing of the examination application AND be within 4 years of his/her date of eligibility in order to sit for the NCLEX. For purposes of the NCLEX, the date of eligibility is defined as the issuance date for the initial Authorization to Test (ATT).