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 You should plan to arrive at the test center at least 30 minutes before your testing time. If you are more than 30 minutes late, you may be required to forfeit your NCLEX appointment and will be required to reregister and pay another exam fee.  Occasionally, technical problems may require rescheduling of your exam.