<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31457262</termId><termName>calcium phosphate</termName><termType>PT</termType><termNote><![CDATA[ Compound formed by interaction of free calcium and phosphate. Calcium phosphate is a component of bone and tooth enamel and the chief source of calcium in bovine milk.  ]]></termNote><termCreatedDate>2026-03-30 21:03:05</termCreatedDate><relation><relationType>UF</relationType><termId>31457263</termId><termName>calcium phosphates</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457264</termId><termName>phosphate, calcium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31438463</termId><termName>calcium compounds</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31471162</termId><termName>hydroxyapatite</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31344454</termId><termName>apatite</termName><termType>PT</termType></relation></term>  </Zthes>