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.
Helix (TV series) Helix is an American science fiction thriller drama television series that aired on Syfy from January 10, 2014 to April 10, 2015. The series followed a team of scientists from the Centers for Disease Control and Prevention who traveled to a research facility in the Arctic to investigate a potential outbreak of disease.