Crossword clues for the word: SERINE The word SERINE has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for SERINE Showing 1 to 10 of 10 results Clue(s) "Protein derivative, like gelatin." Amino acid Amino acid found in proteins Amino acid in many proteins Amino acid in proteins Amino acid synthesized from glucose Certain amino acid Crystalline amino acid Nonessential amino acid Sweet amino acid