Sentence:  A study of their activity on thyroglobulin has shown that thyroxine is not preferentially released and that the degradation proceeds stepwise with the formation of <WSD>macromolecular</WSD> intermediates ( Alpers , Petermann and Rall , 1956 ) . 
Meaning of the word marked with <WSD> tags:  relating to or consisting of or characterized by macromolecules