Risk which is common to an entire class of assets or liabilities. The value of investments may decline over a given time period simply because of economic changes or other events that impact large portions of the market.
Properties of the alpha-helix. 1  The structure repeats itself every 5.4 Angstroms along the helix axis, ie we say that the alpha-helix has a pitch of 5.4 Angstroms. Alpha-helices have 3.6 amino acid residues per turn, ie a helix 36 amino acids long would form 10 turns.
DNA-Physical and chemical properties. The chemical structure of DNA. DNA is a long polymer made from repeating units called nucleotides. The DNA chain is 22 to 26 ÃngstrÃ¶ms Ã¥ngstrÃ¶ms (wide.2 2 to.2 6), nanometres and one nucleotide unit is.3 Ãngstroms (angstroms.Ã¥ngstroms 0) 33. nanometres long