Issue with specification of stable isotopes

[dominik-kopczynski]

I used the ‘isotope suffix’ +[2]H5 for the FA1 chain

I want to use the same ‘isotope suffix’ +[2]H5 for the FA2 chain,
Given that the tracer FA 16:0(+[2]H5) can be converted in vivo to FA 18:0(+[2]H5).
But I cannot (without a workaround).

I suppose the same bug exists for TAGs and CLs… where it could be likely to have 2-3-4 labelled FA chains in an intact molecule.

What about PC 16:0-d5/16:0-d5… would probably happen in lung tissue?