Air-water interface hydrophobic amino acids

Throughout this process, the surface layer is transformed from a homogeneous hydrophobic surface to an inhomogeneous surface with three-dimensional hydrophobic aggregates as well as hydrophilic 'holes' with minimum surfactant coverage. The SC3p hydrophobin of Schizophyllum commune is a small hydrophobic protein (100-101 amino acids with eight cysteine residues) that self-assembles at a water/air interface and coats aerial hyphae with an SDS-insoluble protein membrane, at the outer side highly hydrophobic and with a typical rodlet pattern. With the presence of the water-soluble amino acid l-phenylalanine, however, significant disruption is observed of the stearic acid film, evidenced by the disappearance of its liquid-condensed phase from the isotherm cycles, as well as premature collapse structures observed in the BAM images and a change in intensity in stearic acid's C-H stretching region in the IRRAS spectra. The stearic acid film studied here is well-known to form a very stable floating monolayer at the air-water interface, and is shown in this work to withstand isotherm compression-expansion cycles without any premature collapse. Mode of interaction of hydrophobic amphiphilic alpha-helical peptide/dipalmitoylphosphatidylcholine with phosphatidylglycerol or palmitic acid at the air-water interface Langmuir. handed hydrophobic R-amino acids into 2-D crystal- line arrays from a racemic mixture at the air-water interface.22.

In the work presented here, complementary surface-sensitive information from ПЂ-A isotherms, Brewster angle microscopy (BAM), and infrared reflection-absorption spectroscopy (IRRAS) are used to monitor the induced hydrophobic collapse of a surfactant film by an adsorbed amino acid at the air-water interface. We start by a quantitative analysis of the conformational space of a single LK14 in bulk water. The surface morphology of atmospheric aerosol particles can influence the particle's overall effect on climate through enhancing or impeding its ability to uptake and evaporate water. Here, we study the aggregation behavior of the model peptide LK14 (with amino acid sequence LKKLLKLLKKLLKL) in bulk water and at the air/water interface.

Air-water interface hydrophobic amino acids