Page 19 of 38 · 908 questions tagged peptide-stability.
I have two vials of nominally the same compound from different suppliers. One cake is a dense white puck that sits proud in the vial; the other is a thin, almost…
Two connected things I cannot get a straight answer on. First, chemistry. I keep reading that benzyl alcohol "can destabilise proteins" and I have seen it cited as a…
The specifics, since they change the answer: deamidation · ecnoglutide · 30 °C. I understand the observation; what I do not understand is the mechanism behind it. I…
The particulars: oral semaglutide · 6.67 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online…
For reference: fibrillation · semaglutide · 40 °C. I would like the mechanism, because I want to be able to reason about the cases nobody has written about. I have…
Concretely: survodutide · 5 mg/mL · ten weeks. The claim is plausible, which is exactly why I want to check it. I am able to read a paper if someone points me at one.…
Stated plainly: retatrutide · 2 mg/mL · sixteen weeks. This is asserted often enough that I assumed it was established, and then I went looking for the source. I have…
Stated plainly: dulaglutide · 8 mg/mL. Everything I have found on this is either a forum aside or a product page, neither of which I trust. I am comfortable with the…
Numbers first: a GLP-1 receptor agonist · 1 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out,…
Stated plainly: dulaglutide · 4 °C. This is asserted often enough that I assumed it was established, and then I went looking for the source. I have searched the…
The specifics, since they change the answer: liraglutide · minus 20 °C · three days. I would like to define my thresholds before I have a result, for obvious reasons.…
The case in front of me: survodutide · 30 °C. I want to know whether there is evidence behind this or only repetition. I have checked the obvious registries and…
Numbers first: mazdutide · six weeks · minus 80 °C. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to…
I keep a written log of every draw with date, volume and syringe type. I would like to understand the steps well enough to explain them to someone else. I have access…
Details up front: a GLP-1 receptor agonist · 6.67 mg/mL. I would like to understand the steps well enough to explain them to someone else. I have access to a…
Details up front: fibrillation · semaglutide · Medutest. I want a method I can write down and repeat, not a rule of thumb. I would rather over-engineer this than…
The case in front of me: survodutide · minus 20 °C. I am trying to do this correctly the first time rather than learn it by getting it wrong. I have already made one…
What I am working with: aggregation · a GLP-1 receptor agonist · 40 °C. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make…
My background is chemistry rather than physiology, which may explain where I am stuck. This is not behaving the way I expected and I want to understand the…
Stated plainly: orforglipron · 5 mg/mL · sixteen weeks. This is asserted often enough that I assumed it was established, and then I went looking for the source. I…
Details up front: hydrolysis · a C8 column. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to know how…
Concretely: aspartimide formation · tirzepatide · 2–8 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted…
Concretely: ecnoglutide · 5 mg/mL. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as the…
Stated plainly: aggregation · mazdutide · minus 80 °C. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me suspicious. My…