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Isolation and characterization of a kettin-like protein from crayfish claw muscle

✍ Scribed by Saori Maki; Yukiko Ohtani; Sumiko Kimura; Koscak Maruyama

Publisher: Springer Netherlands
Year: 1995
Tongue: English
Weight: 685 KB
Volume: 16
Category: Article
ISSN: 0142-4319
DOI: 10.1007/bf00130239

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✦ Synopsis

A 540 kDa protein was isolated from crayfish claw muscle (closer). The secondary structure mainly consisted of ~-sheet (70%). The rotary shadowed images were long filaments, 300-360 nm long. It is localized in the sides of the Z-lines extending to the I band and elongatable upon stretch of muscle. Immunological crossreactivities strongly suggested that this protein corresponds to kettin (500-700 kDa) of insect striated muscle. In view of molecular shape and secondary structure, and immunological crossreactivities, it is suggested that this kettin-like protein belongs to connectin/titin family of striated muscle.

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