A complete set of #nucleobases in the #carbonaceous_asteroid #Ryugu!
Un ensemble complet de #nucléobases dans l' #astéroïde Ryugu!
Les 5 acides nucléiques: #adénine (A) #guanine (G) #cytosine (C) #thymine (T) #uracile (U): A, G, C, T dans #ADN ; A, G, C, U dans #ARN.
www.nature.com/articles/s41...

Here is a crystal structure of the 2'-dG-III riboswitch (PDB code: 9LKW)

Rendering by Francisco J. Enguita made with #ProteinImager

3dproteinimaging.com/protein-imag...

#SciArt #molecularart #scivis #riboswitch #guanine #xray

If layers of #guanine crystals sound familiar, that might be because they're also seen in the reflective tapetum at the back of the eye in some #shark species (...and I think also #crocodilian eyes)

pubmed.ncbi.nlm.nih.gov/7893012/

🦈 #shark

Further coverage, this time from scitechdaily, of new research from Dr. Viktoriia Kamska into the way spacing of nano-size s
#guanine scales in their #dermaldenticles affect the coloration of #bluesharks

scitechdaily.com/these-sharks...

Theoretical Study of Guanine Oxidation Catalyzed by a Ruthenium Complex with an Oxygen Molecule | Inorganic Chemistry pubs.acs.org/doi/10.1021/... Ikeda and Shiota @InorgChem #ruthenium #oxygen #DFT #guanine