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Cover Picture: The Chemistry of Escapin: Identification and Quantification of the Components in the Complex Mixture Generated by an L-Amino Acid Oxidase in the Defensive Secretion of the Sea Snail Aplysia californica (Chem. Eur. J. 7/2009)

Authors

  • Michiya Kamio Dr.,

    1. Department of Biology, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010 (USA)
    2. Neuroscience Institute, Georgia State University, P.O. Box 5030, Atlanta, GA 30302-5030 (USA), Fax: (+1) 404-413-5446
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    • These authors contributed equally to this study.

  • Ko-Chun Ko,

    1. Department of Biology, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010 (USA)
    2. Neuroscience Institute, Georgia State University, P.O. Box 5030, Atlanta, GA 30302-5030 (USA), Fax: (+1) 404-413-5446
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    • These authors contributed equally to this study.

  • Shilong Zheng Dr.,

    1. Department of Chemistry, Georgia State University, P.O. Box 4098, Atlanta, GA 30302-4098 (USA)
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  • Binghe Wang Prof.,

    1. Department of Chemistry, Georgia State University, P.O. Box 4098, Atlanta, GA 30302-4098 (USA)
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  • Stacy L. Collins,

    1. Department of Chemistry, Georgia State University, P.O. Box 4098, Atlanta, GA 30302-4098 (USA)
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  • Giovanni Gadda Prof.,

    1. Department of Biology, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010 (USA)
    2. Department of Chemistry, Georgia State University, P.O. Box 4098, Atlanta, GA 30302-4098 (USA)
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  • Phang C. Tai Prof.,

    1. Department of Biology, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010 (USA)
    2. Neuroscience Institute, Georgia State University, P.O. Box 5030, Atlanta, GA 30302-5030 (USA), Fax: (+1) 404-413-5446
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  • Charles D. Derby Prof.

    1. Department of Biology, Georgia State University, P.O. Box 4010, Atlanta, GA 30302-4010 (USA)
    2. Neuroscience Institute, Georgia State University, P.O. Box 5030, Atlanta, GA 30302-5030 (USA), Fax: (+1) 404-413-5446
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Abstract

Defensive chemicals such as the ink secretion of this marine gastropod mollusk—the sea hares Aplysia californica—are released following attacks from predators for protection. One might expect these secretions to be complex mixtures of products, given that they must work against a diversity of predators. In their Full Paper on page 1597 ff., C. D. Derby et al. describe some of the chemical complexity of the ink of sea hares attributable to the enzyme “escapin”. Escapin is an L-amino acid oxidase that oxidatively deaminates its major substrate, L-lysine, to produce an equilibrium mixture of the molecules shown in this image. Photograph from Genny Anderson (Santa Barbara City College).

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