• hydrocarbons
  • In February 2014, NASA announced a greatly upgraded database for tracking polycyclic aromatic hydrocarbons (PAHs), including phenanthrene, in the universe. (wikipedia.org)
  • amino
  • Tryptophan is bound by a number of interactions: other aromatic amino acid residues such as tryptophan, phenylalanine, and histidine seemingly "sandwich" the substrate, the N-H group of tryptophan forms hydrogen bonding interactions with the peptide backbone of the enzyme, and the amino acid moiety of tryptophan interacts with nearby tyrosine and glutamate residues. (wikipedia.org)
  • alkene
  • In addition, the lone pair on iodide donates into the ╥* of the alkene, which reduces electrophilic character on the carbon as a result of decreased positive charge. (wikipedia.org)