<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Human thymopoietin is a peptide hormone that is produced in the thymus. It is comprised of two closely-related polypeptide hormones (each ~ 7kD) and functions to induce differentiation of prothymocytes to thymocytes. Mutations in thymopoietin can delay or impair neuromuscular transmission. It has been implicated in both the structural organization of the nucleus and in post-mitotic nuclear assembly.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>