Sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu
The composition according to Claim 1, wherein the surfactant is chosen from about 60% to about 99%, based on total polymer weight, of a quaternary diallyl dialkyl ammonium monomer, wherein alkyl groups are independently selected from alkyl groups of 1 to 18 carbon atoms, C 1-4 alkyl, and wherein said quaternary diallyl dialkyl ammonium monomer's counterion is selected from the group consisting of conjugate bases of acids having an ionization constant greater than 10 13 , selected from the group consisting of fluoride, chloride, bromide, hydroxide, nitrate, acetate, hydrogen sulfate and primary phosphates
These included iohexol (known under the commercial name Nycodenz) in the early nineteen-eighties and about ten years later iodixanol, which is more or less a dimer of Nycodenz (see Figure 1)

the topical sunscreen compositions in some embodiments are intended to provide a sun protection factor (SPF) rating of at least 2, with additional preferable embodiments having a sun protection factor of at least 5, in other embodiments at least 10, in other embodiments at least 15, in other embodiments at least 20, in other embodiments at least 25, in other embodiments at least 30, in other embodiments at least 35, in other embodiments at least 40, in other embodiments at least 45, in other embodiments at least 50, in other embodiments at least 55, in other embodiments at least 60, in other embodiments at least 65, in other embodiments at least 70, in other embodiments at least 75, in other embodiments at least 80, in other embodiments at least 85, in other embodiments at least 90, in other embodiments at least 95, and in other embodiments at least 100
K.KiefferN.NordmannP.et al
Inspired by these natural systems, chemists have developed artificial molecular machines based on mechanically interlocked architectures like (pseudo)rotaxanes and catenanes 1,2