<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE amino-acid SYSTEM "aminoacids.dtd">
<amino-acid>
   <name>Lysine</name>
   <abbreviation>lys</abbreviation>
   <symbol>k</symbol>
   <molecular-formula>C6H14N2O2</molecular-formula>
   <molecular-weight>146.19</molecular-weight>
   <isoelectric-point>9.59</isoelectric-point>
   <CAS-registry-number>39665-12-8</CAS-registry-number>
</amino-acid>
