Figure 1.

Molecular structure of amphipols. The weight average apparent molecular weight (〈MW〉) was deduced from the 〈MW〉 of the polyacrylate precursors as estimated by gel permeation chromatography using narrow MW polyoxyethylene calibration standards (which may entail systematic errors). DP (〈MW〉/MW of monomer) is the corresponding number of units per chain. The number of monomers per chain in the most abundant molecules (representing ≈80% of the mass) actually ranges over one decade. x, y, and z are the molar percentages of each type of unit, randomly distributed along the chain. The average number of each type of unit per amphipol molecule is given between parentheses.