tokens: Further characterization of gelatinase granules has been hampered by poor separation of specific and gelatinase granules on both two-layer Percoll gradients and sucrose gradients .
folded_tokens: further characterization of gelatinase granules has been hampered by poor separation of specific and gelatinase granules on both two-layer percoll gradients and sucrose gradients .
labels: O O O B-cell_component I-cell_component O O O O O O O O O B-cell_component I-cell_component O O B-other_name I-other_name I-other_name O B-carbohydrate O O