510-methenyltetrahydrofolate synthetase

5,10-meth·e·nyl·tet·ra·hy·dro·fo·late syn·the·tase (meth″ə-nəl-tet″rə-hi″dro-foґlāt sinґthə-tās) 5-formyltetrahydrofolate cyclo-ligase.