Analytical HPLC gel filtration of spectrin recombinant peptides. Chromatograms are shown at the same absorbance scale with baseline offsets for clarity. Fifty micrograms of each peptide was injected (A) immediately after purification and (B) after storage on ice for 10 days. Chromatograms from top to bottom are α18-21, α18-21¹⁸⁵⁷, and α18-21^1857-Δ46.