Existing Wording: These range from direct sequencing, inference from microarrays, and mass spectrometry.?

Comment:

Reference for mass spec hadn't realized it was still used:

Characterization of nucleic acids by tandem mass spectrometry ? The second decade (2004?2013): From DNA to RNA and modified sequences

Stefan Sch?rch

First published: 06 October 2014 https://doi.org/10.1002/mas.21442

Summary:

Include reference for use of mass spec