Page 2 of 4 · 83 questions tagged peptide-mapping.
Details up front: 97.6% · dulaglutide. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…
For reference: 97.9% · ecnoglutide. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator because…
The case in front of me: 97.9% · tirzepatide. Please show the division. I want to check my own against yours. I would like the general form as well as the specific…
What I am working with: 97.6% · mazdutide. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and…
Stated plainly: 97.6% · cagrilintide. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and it…
The specifics, since they change the answer: 97.6% · ecnoglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two…
Details up front: 96.4% · orforglipron. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would…
What I have: 99.1% · retatrutide. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would rather…
For reference: 96.8% · semaglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor of…
What I am working with: an endotoxin test · racemisation · survodutide. I suspect the honest answer is that it depends, in which case I would like to know on what.…
The method section is present, which is unusual enough that I want to make use of it. I would like to know the limits of what can be inferred from this. What I am…
The method section is present, which is unusual enough that I want to make use of it. I want to know whether this is a real physical effect or an artefact of how it…
What I have: 97.1% · orforglipron. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…
The case in front of me: 98.2% · liraglutide. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as…
I have been quoted roughly four times the price of a purity-plus-identity panel for something described as "tryptic digest with LC-MS/MS peptide mapping and sequence…
The method section is present, which is unusual enough that I want to make use of it. I have read the primary source rather than the summary, which has left me with…
For reference: 97.1% · ecnoglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor of…
The recurring point in this tag is that stereoisomers and sequence isomers are invisible to mass spectrometry. I accept that for intact mass. What I want to know is…
The specifics, since they change the answer: 95.2% · ecnoglutide. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not…
Conditions: 97.6% · tirzepatide. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number, so I…
Details up front: 96.8% · orforglipron. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method…
What I am working with: a residual-solvent screen · hydrolysis · ecnoglutide. Both of these get recommended confidently by different people, which suggests neither is…
The case in front of me: 96.4% · oral semaglutide. Please show the division. I want to check my own against yours. I would like the general form as well as the…
Conditions: 98.2% · tirzepatide. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number, so I…