Probably a bunch of old people making rules about how and where it should go next! Check this out!
Imagine some prominent aptamer research center somewhere that has been just tearing that field up for the last 20 years. They can make DNA oligomers that can bind to just about anything. In the aptamer field this group is right up there with the 5 best groups in the world. All the grants coming their way allow them to pick up their first mass spectrometer so they can check that the masses of their products make sense without sending them out, and they go with a nice ESI ion trap system. After they get used to running this thing, someone brings in an aptamer binding reaction that doesn't make any sense with their traditional assays and they decide to infuse it on the ion trap. What they see is more than one compound and they can't really tell what is going on, it's too complicated, so someone gets the crazy idea of coupling an HPLC to that ion trap to reduce the complexity. It turns out that DNA oligomer made in that new organism (I dunno) has a big mass discrepancy, so these researchers dial in their chromatography and fragment that ion. Get this: What they see is a bunch of ions that correspond to amino acid masses, and if they were in a perfectly linear chain, the masses only line up if the exact same bond (!!) was broken at every amino acid. Shine up that Nobel Prize, because what they find is that a whole lot of their old aptamer things that were discarded actually have these long linear amino acid chains stuck to them. Unbelievably, they can work out EVERY one of them now because these amino acid chains all fragment the exact same way.
Now we'll step out of this scenario and back to you, strange person who has read this far:
Imagine how excited you are going to be when Science Magazine's Aptamer Research Journal (SMARJ) and other leading papers in the field publishes twenty five papers (18 of them are reviews from the guy who supervised the guy who first ran the ion trap) that drop in a 2 year period. Linear amino acid chain identification by vacuum chamber accelerated breakage coupled to reversed phase liquid based separation of reacted aptamer products (LAACIbVCABcRpLbS_RAP) is even making mainstream news. Oh crap. They've even got software that can semi-automatically figure out the order of those amino acids now and it's in one-word Nature! Boom. Paper. Boom. Paper. It is 2022 and Ion Trap sales are off the charts. Every aptamer researcher in the world needs their own because LAACIbVCABcRpLbS_RAP is the future of medicine and environmental research.
And then all those top aptamer researchers in the world get together and start releasing community guidelines. They even indicate in those guidelines that they know that proteomics exists. Heck, they're even thinking about some of the proteomics data (while, of course, focusing almost entirely on how much better LAACIbVCABcRpLbS_RAP is than the Excel sheets of proteomics data they pulled from the supplemental info of a couple of PLOS papers that are making the rounds in their circles).
Now, assuming that this rambling metaphor has anything at all to do with whatever I started talking about, I should note that this group is still taking suggestions! You can add your community guidelines and recommendations to LAACIbVCABcRpLbS_RAP, wait, I mean, single cell proteomics, at this cool site here: https://single-cell.net/guidelines