Abstract: A cyclic olefin copolymer that is a copolymer of a cyclic olefin monomer and an ?-olefin having 3 or more and 20 or less carbon atoms, which has excellent tensile strength and breaking strain, and a method for producing the cyclic olefin copolymer. In the copolymer, the amount of structural units derived from the ?-olefin is 10 mol % or more and 50 mol % or less relative to the entire structural units, and in the relaxation time T1? of a hydrogen nucleus by solid-state NMR measurement for the cyclic olefin copolymer, the average value of the relaxation time corresponding to each hydrogen in the cyclic olefin copolymer is in the range of 4.5 to 5.5 msec, and the difference between the maximum value and the minimum value of the relaxation time is in the range of 1.0 to 3.0 msec.

Abstract: A cyclic olefin copolymer that is a copolymer of a cyclic olefin monomer and an ?-olefin having 3 or more and 20 or less carbon atoms, which has excellent tensile strength and breaking strain, and a method for producing the cyclic olefin copolymer. In the copolymer, the amount of structural units derived from the ?-olefin is 10 mol % or more and 50 mol % or less relative to the entire structural units, and in a one-dimensional scattering curve with respect to the scattering vector q of small angle X-ray scattering for the cyclic olefin copolymer, a value obtained by dividing the half value width of a primary peak by the q value of the peak top thereof is in the range of 0.15 to 0.45.

Abstract: The present application provides: a polypeptide characterized by having an ability of penetrating into a cell and the structure represented by Formula (I) wherein n is a number of 2 to 20; R1 and R2 may independently represent a C1-C4 alkyl group or may bind to each other to form a ring; R3 represents a C1-C10 primary aminoalkyl group; R4 represents a hydrogen atom or a C1-C10 hydrocarbon group; the “n” number of R1, R2, R3, and R4 may independently be the same with or different from each other; and the N-terminus and the C-terminus may or may not be modified independently; and a cell-invasive composition comprising the polypeptide and a substance of interest.

Abstract: The present application provides: a polypeptide characterized by having an ability of penetrating into a cell and the structure represented by Formula (I) wherein n is a number of 2 to 20; R1 and R2 may independently represent a C1-C4 alkyl group or may bind to each other to form a ring; R3 represents a C1-C10 primary aminoalkyl group; R4 represents a hydrogen atom or a C1-C10 hydrocarbon group; the “n” number of R1, R2, R3, and R4 may independently be the same with or different from each other; and the N-terminus and the C-terminus may or may not be modified independently; and a cell-invasive composition comprising the polypeptide and a substance of interest.