1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) negation of a word or group of words 2) an enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia 3) a writing implement with a point from which ink flows DOWN 1) a period of time spent sleeping 2) a lyric poem with complex stanza forms 3) your grandmother ** Scroll down for solution. ** Are you sure you want to peek? non ada pen