Each vial is sterile, non-pyrogenic, and sealed for integrity at the time of shipment
Returning to the definition of half-life as the time required for the blood level to drop by half, if the steady state blood level of a drug with linear pharmacokinetics is considered to be 100%, then, if the drug is suddenly withdrawn, its level will drop to 50% after the first half-life, to 25% after the second half-life, to 12.5% after the third half-life, to 6.25% after the fourth half-life, and to 3.125% after the fifth half-life (Figure 1)
References Allagnat F, Christulia F, Ortis F, Pirot P, Lortz S, Lenzen S et al (2010) Sustained production of spliced X-box binding protein 1 (XBP1) induces pancreatic beta cell dysfunction and apoptosis
A., Holton, T., Yuneva, M., Louie, R
A major challenge in this field is obtaining homogeneous protein samples with acetylation of the Lys residue of interest