5 Key Takeaways

• 1

  GinorMass is a public repository containing 23,971,300 tandem mass spectra, all acquired from the single molecule arginine.

• 2

  The repository demonstrates that a high spectrum count does not necessarily indicate broad chemical coverage.

• 3

  Researchers acquired the spectra from an arginine reference standard using a quadrupole time-of-flight mass spectrometer under fixed conditions.

• 4

  Repeated spectra can capture variation across instruments, laboratories, and acquisition conditions, but measurements under fixed conditions may become redundant.

• 5

  The authors recommended reporting spectral counts alongside chemical diversity, acquisition conditions, annotation confidence, and data provenance.