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Plant and Cell Physiology, 1982, Vol. 23, No. 4 709-712
© 1982

Short communication

Part of the Lysyl Residues in Wheat {alpha}-Amylase is Methylated as N-{varepsilon}-Trimethyl Lysine

Kiyoto Motojima1 and Kenji Sakaguchi

Laboratory of Microbiological Chemistry, Mitsubishi-Kasei Institute of Life Sciences Machida-shi, Tokyo 194, Japan

Amino acid analyses of wheat {alpha}-amylase purified from germinating seeds by affinity chromatography showed a high content of a modified lysyl residue. The modified residue was identified as N-{varepsilon}-trimethyl lysine. The presence of trimethyl lysine in {alpha}-amylase is discussed in terms of isozymes.

1 Present address: National Institutes of Health, Bldg. 10, Rm. 9B-15, Bethesda, MD 20205, U.S.A.

(Received August 20, 1981; Accepted March 19, 1982)
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