For an optical recording medium having a phase change type recording layer on its a substrate and having as read only area and a writable area in a recording area, a data recording method is provided which records data in the writable area. These enzymes are a novel isotype of starch synthase. The adapter comprises further a curved fiber guiding surface corresponding to the curve of an opening roller as well as a boundary wall for reducing the size of the trash removal opening arranged directly upstream of the fiber guiding surface. A second end portion of the exhaust pipe is located within the internal space of the muffler. A sleeve-shaped accessory unit with a hollow interior for retaining computer accessories therein is configured to be hung on the slat wall panel directly above the shelf.