Tokyo University of Agriculture and Technology

Spiber Inc.

Tetsuo Asakura

Keisuke Morita

Yunosuke Abe

Hiroyuki Nakamura

Shota Togashi

Kazuo Yamauchi

The present invention relates to a modified fibroin including a domain sequence represented by Formula 1: [(A)motif-REP]or Formula 2: [(A)motif-REP]-(A)motif, and having a serine residue content rate of less than 5.5%. [In Formula 1 and Formula 2, the (A)motif represents an amino acid sequence consisting of 4 to 27 amino acid residues, and the number of alanine residues with respect to the total number of amino acid residues in the (A)motif is 80% or more. REP represents an amino acid sequence consisting of 10 to 200 amino acid residues. m represents an integer of 10 to 300. The plurality of (A)motifs may be the same amino acid sequence or different amino acid sequences. A plurality of REPs may be the same amino acid sequence or different amino acid sequences.]

Modified fibroin

A spinning solution composition which provides regenerated silk fiber that exhibits a strength and elongation close to those of natural silk fiber, is rapidly degradable in vivo, and can be caused to have ability to gradually release a drug to prevent inflammation; a process for producing such regenerated silk fiber by use of the composition; and regenerated silk fiber obtained through the process.

Spinning solution composition, process for producing regenerated silk fiber using the composition, and regenerated silk fiber produced by the process

The present invention discloses a sample tube for the magic angle high-speed rotation method used in a solid nuclear magnetic resonance device probe wherein a radio wave irradiation/detection coil is disposed close to a sample and a method of measuring a high resolution nuclear magnetic resonance absorption spectrum using the same. This tube is suitable for solid nuclear magnetic resonance (solid NMR) measurements of minute amounts of sample. The sample tube has a capillary part filled with a sample and non-capillary parts situated at its two ends, and a spinner which can be detachably inserted into at least one of the outer ends of the non-capillary parts. The capillary part and non-capillary parts are made of a ceramic and/or polymer material.

Sample tube for solid-state nuclear magnetic resonance apparatus magic angle high-speed rotation method and method for measuring nuclear magnetic resonance absorption spectrum employing it

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Fuchu, Japan

Tetsuo Asakura