Thymopoietins

**Definition:** Two closely related polypeptides (molecular weight 7,000) isolated from the thymus gland. These hormones induce the differentiation of prothymocytes to thymocytes within the thymus. They also cause a delayed impairment of neuromuscular transmission in vivo and are therefore believed to be the agent responsible for myasthenia gravis.

**Tree numbers:** - D06.472.910.800

**Synonyms:** - Thymopoietin - Thymins - Thymin