yeastGEM.xlsx, as the latter is only in the
masterbranch and thereby always behind the latest changes. You can read the proper way to contribute here and look at an example on how are changes typically included here. Note in particular that all information is added through
.tsvtables, which you can construct in excel (just make sure to check later they look ok in a text editor and no weird characters are introduced).
Q02891originally comes from the RHEA database (it shows 'Source: RHEA' on the Uniprot site). RHEA is fully contained in MetaNetX. So the reaction that you linked has the identifier
RHEA:17229which brings you to https://www.metanetx.org/equa_info/MNXR125910.