Structure is: NH2 - CH2 - CHOH - CH2 - CH2 - C2H4NO2
Number of hydrogens vary due to carboxyl/amino groups and the acidity or alkilinity of their sorroundings
See http://herkules.oulu.fi/isbn9514267990/html/x319.html for more in depth information about the biological context of this amino acid.
wikipedia.org dumped 2003-03-17 with terodump