Dimerization of α and β peptides. Chromatograms are shown at the same scale with baseline offsets for clarity. (A) (– - - –) 1,000 pmol β1-4⁺ recombinant peptide; (- - -) 1,000 pmol α 18-21 recombinant peptide; ( — ) 1,000 pmol each of β1-4⁺ and α18-21 incubated on ice 25 minutes before gel filtration. (B) (– - - –) 1,000 pmol β1-4⁺ recombinant peptide; (- - -) 1,000 pmol α18-21¹⁸⁵⁷ peptide; ( — ) 1,000 pmoles each of β1-4⁺ and α18-21¹⁸⁵⁷ incubated on ice 25 minutes before gel filtration. (C) (– - - –) 1,000 pmol β1-4⁺ recombinant peptide; (- - -) 1,000 pmol of a 18-21^1857-Δ46; ( — ) 1,000 pmol each of β1-4⁺ and a 18-21^1857-Δ46 incubated on ice 25 minutes before gel filtration. All quantities are based on the amount of monomer species present in the sample at the time of the experiment.