PNAS: “your letter does not contribute significantly to the discussion of this paper”

Thanks to BiorXiv, you can read, comment upon, and cite, a letter which, according to PNAS editorial board, does not contribute significantly to the discussion of

“Quantification and real-time tracking of RNA in live cells using Sticky-flares“

William E. Briley, Madison H. Bondy, Pratik S. Randeria, Torin J. Dupper, Chad A. Mirkin, Proceedings of the National Academy of Sciences (2015)

Here is the email from Inder Verma, Editor-In-Chief:

November 16, 2015

Title: “Sticky-flares: real-time tracking of mRNAs… or of endosomes?”
Tracking #: 2015-20468
Authors: Mason and Levy

Dear Dr. Levy,

I regret to inform you that the PNAS Editorial Board has declined to publish your Letter to the Editor. After careful consideration, the Board has decided that your letter does not contribute significantly to the discussion of this paper.

Thank you for submitting your comments to PNAS.

Sincerely yours,
Inder Verma
Editor-in-Chief

 You can also check the comments at PubPeer.