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.
Reapplying for the Exam. To re-register for the NCLEX-RN exam, test-takers should contact their state board of nursing and complete the necessary forms and pay the re-take fee. The board of nursing will issue another authorization to test, and the retake can be scheduled with Pearson VUE.eapplying for the Exam. To re-register for the NCLEX-RN exam, test-takers should contact their state board of nursing and complete the necessary forms and pay the re-take fee. The board of nursing will issue another authorization to test, and the retake can be scheduled with Pearson VUE.