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.
NCLEX Examination Scoring. The NCLEX examination is scored once by the computer on which you are taking it, and a second time by the National Councilâs testing service. It will take about a month for your state board of nursing to mail you the results of your exam.