Melanin is the natural pigment responsible for skin color
R-alpha-lipoic acid, the naturally occurring form, may offer advantages over synthetic alpha-lipoic acid, which contains both R and S enantiomers
Several downtown residents spoke out against the nomination at the June 22 commission meeting, with one referring to it as taxation without representation. The DDA is a special taxing agency whose purpose is to support and enhance the citys downtown
If a sulfur atom is bonded to sulfur atom of another cysteine, a covalent disulfide bridge is formed which is weaker (easier to split) than peptide bond, but stronger than any interaction of the other type (hydrogen bonds, salt bridges, hydrophobic and van der Waals interactions)
But it itself becomes a pro-oxidant after it does its job of quenching a pro-oxidant by donating an electron