==One more link== 

 I noticed these discussions ongoing yesterday but didn't get around to replying. One more summary link to add to the pile: Wikipedia:Ten Simple Rules for Editing Wikipedia, which was originally published in PLoS Computational Biology to orient scientists to the Wikipedia environment. Rules 7-9 seem pertinent. Some of your suggested additions, while they are certainly interesting results, were being redundantly added in multiple articles in a way that creates an undue weight problem. 

 The point of the emphasis on review articles is to wait till particular new studies have been placed in the context of the broader field, which your proposed additions to various beta-sheet-related articles currently don't provide. In particular, any discussion of the dynamic features of beta sheets should really include studies by NMR in folded proteins, mechanical unfolding studies by AFM, and probably also spectroscopic and simulation work on the folding process of beta hairpins and small beta-sheet-containing proteins like GB1. Posting this here instead of on the articles' talk pages since there are multiple of them where you've proposed similar additions.