<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31316755</termId><termName>antibodies</termName><termType>PT</termType><termNote><![CDATA[ Class of protective proteins, naturally present in the body or produced by the immune system, which target harmful foreign substances, called antigens, in order to remove them from the body.  ]]></termNote><termCreatedDate>2026-03-30 20:25:18</termCreatedDate><relation><relationType>UF</relationType><termId>31316756</termId><termName>antibody</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31316757</termId><termName>immunoglobulin</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31316758</termId><termName>immunoglobulins</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31303906</termId><termName>protein</termName><termType>PT</termType></relation></term>  </Zthes>