Composition for biotissue clearing and biotissue clearing method using same

A method for clearing a biotissue, the method comprising a step of clearing a fixed biotissue by contacting the fixed biotissue with a composition comprising an amino acid represented by Formula 1, or a salt thereof:

• wherein R1 is CH3,
• wherein R2 is a straight-chained or branched C8-C20 alkylcarbonyl, and
• wherein R3 is H;
• and
• wherein the composition further comprises one or more selected from the group consisting of urea, 3-[(3-Cholamidopropyl)dimethylammonio]-1-propanesulfonate) (CHAPS), 3-[(3-Cholamidopropyl)dimethylammonio]-2-hydroxy-1-propanesulfonate) (CHAPSO), sucrose, fructose, glycerol, diatrizoic acid, t-octylphenoxypolyethoxyethanol, polyoxyethylene (20) sorbitan monolaurate, 2-2-thiodiethanol, and iohexol.