Assertion: pyrimidine | /r/HasProperty | acid
Facets:
Source sentences:
text: The fact that neither radioactive uracil nor known precursors of this pyrimidine (orotic acid and aspartic acid) are incorporated in any significant quantities into the pyrimidine moiety of thiamine by Escherichia coli indicates that this specific pyrimidine compound is made by a biosynthetic pathway that is different from that by which other pyrimidines are made.