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.
You will need to use the ATT within 90 days or else it will expire. When you pass the exam, you will be notified within ten days and it will already come with NCLEX result and LPN license. Just in case you did not pass, you can still re-apply for the LPN license but this will again cost you the same fees.