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1. Experimental and theoretical investigations of infrared multiple photon dissociation spectra of lysine complexes with Zn 2+ and Cd 2+

   https://doi.org/10.1177/1469066718792902  

   Owen, Cameron J ; Boles, Georgia C ; Berden, Giel ; Oomens, Jos ; Armentrout, PB ( February 2019 , European Journal of Mass Spectrometry)
2. Quantification of N 6 ‐formylated lysine in bacterial protein digests using liquid chromatography/tandem mass spectrometry despite spontaneous formation and matrix effects

   https://doi.org/10.1002/rcm.9019  

   Folz, Jacob S. ; Patterson, Jenelle A. ; Hanson, Andrew D. ; Fiehn, Oliver ( January 2021 , Rapid Communications in Mass Spectrometry)

   N⁶‐Formyl lysine is a well‐known modification of histones and other proteins. It can also be formed as a damaged product from direct formylation of free lysine and accompanied by other lysine derivatives such as acetylated or methylated forms. In relation to the activity of cellular repair enzymes in protein turnover and to lysine metabolism, it is important to accurately quantify the overall ratio of modified lysine to free lysine.

   N⁶‐Formyl lysine was quantified using liquid chromatography/tandem mass spectrometry (LC/MS/MS) with data collected in a non‐targeted manner using positive mode electrospray ionization on a Q‐Exactive HF⁺Orbitrap mass spectrometer. Studies were performed with lysine and deuterated lysine spiked into protein digests and solvents to investigate the extent of spontaneous formation and matrix effects of formation ofN⁶‐formyl lysine.

   We show thatN⁶‐formyl lysine,N²‐formyl lysine,N⁶‐acetyl lysine, andN²‐acetyl lysine are all formed spontaneously during sample preparation and LC/MS/MS analysis, which complicates quantification of these metabolites in biological samples.N⁶‐Formyl lysine was spontaneously formed and correlated to the concentration of lysine. In the sample matrix of protein digests, 0.03% of lysine was spontaneously converted intoN⁶‐formyl lysine, and 0.005% of lysine was converted intoN⁶‐formyl lysine in pure run solvent.

   Spontaneous formation ofN⁶‐formyl lysine,N⁶‐acetyl lysine,N²‐formyl lysine, andN²‐acetyl lysine needs to be subtracted from biologically formed lysine modifications when quantifying these epimetabolites in biological samples.

    

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3. Quantum-vibrational-state-selected Integral Cross Sections and Product Branching Ratios for the Ion-molecule Reactions of N 2 + ( X 2 Σ g + ; v + = 0–2) + H 2 O and H 2 O + ( X 2 B 1 : v 1 + v 2 + v 3 + = 000 and 100) + N 2 in the Collision Energy Range of 0.04–10.00 eV

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   Xu, Yuntao ; Xiong, Bo ; Chang, Yih Chung ; Ng, Cheuk-Yiu ( July 2018 , The Astrophysical Journal)
4. Solid-State End-On to Side-On Isomerization of (N═N) 2– in {[(R 2 N) 3 Nd] 2 N 2 } 2– (R = SiMe 3 ) Connects In Situ Ln III (NR 2 ) 3 /K and Isolated [Ln II (NR 2 ) 3 ] 1– Dinitrogen Reduction

   https://doi.org/10.1021/jacs.2c06716  

   Chung, Amanda B. ; Rappoport, Dmitrij ; Ziller, Joseph W. ; Cramer, Roger E. ; Furche, Filipp ; Evans, William J. ( September 2022 , Journal of the American Chemical Society)
5. Synthesis and Characterization of Non-Aqueous [Tc X M-PW 11 O 39 ] n - with M = O, N: Comparing Tc V and Tc VI in Metal Oxide Matrices: Synthesis and Characterization of Non-Aqueous [Tc X M-PW 11 O 39 ] n - with M = O, N: Comparing Tc V and Tc VI in Metal Oxide Matrices

   https://doi.org/10.1002/ejic.201900864  

   Burton-Pye, Benjamin P. ; Dembowski, Mateusz ; Lukens, Jr., Wayne W. ; Cruz, Anthony ; Althour, Alrasheed ; Lopez, Gustavo E. ; Salcedo, Ramsey ; Gallagher, Colleen M. B. ; McGregor, Donna ; Francesconi, Lynn C. ( November 2019 , European Journal of Inorganic Chemistry)