<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE amino-acid SYSTEM "aminoacids.dtd">
<amino-acid>
   <name>Serine</name>
   <abbreviation>ser</abbreviation>
   <symbol>s</symbol>
   <molecular-formula>C3H7NO3</molecular-formula>
   <molecular-weight>105.09</molecular-weight>
   <isoelectric-point>5.68</isoelectric-point>
   <CAS-registry-number>56-45-1</CAS-registry-number>
</amino-acid>
