Database Searching (MSFragger): Control human serum injections (no PNGase F) from the 0hour time points were searched using the glyco-N-open-HCD workflow in MSFragger (v3.5) with FragPipe (v18.0) and Philosopher (v4.4.0) to detect glycopeptides for comparative purposes. Default settings for this workflow were used, along with the Homo sapiens database as described above.