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Pressure-area isotherms of 68:22:8 DPPC/POPG/PA lipid mixture with various amounts of dSP-B1-25, a peptide mimic of native SP-B (25). Increasing the dSP-B1-25 fraction moves the isotherms to the right, indicating that the dSP-B1-25 is retained in the film. The collapse pressure stays the same.
