Sentence:  This iodoprotein does not appear to be the same as what is normally present in the thyroid , and there is <WSD>no</WSD> evidence so far that thyroglobulin can be iodinated in vitro by cell-free systems . 
Meaning of the word marked with <WSD> tags:  quantifier; used with either mass nouns or plural count nouns for indicating a complete or almost complete lack or zero quantity of