{'fraction_non_alphanumeric': 0.03453689167974882, 'fraction_numerical': 0.01098901098901099, 'mean_word_length': 5.254901960784314, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Replication of mouse mammary tumor cells in monolayer cultures stimulated with embryo extract.

A particulate fraction derived from homogenized chicken embryos was added to primary monolayer cultures of mouse mammary tumor cells. All culture media contained fetal calf serum (10%). After 4 days, the extract had stimulated a twofold increase (relative to controls lacking the extract) in (1) total DNA per culture; (2) the rate of incorporation of labeled DNA precursors; (3) epithelial cell number, and (4) total protein. This integrated growth activity is discussed in terms of the nature and exogenous regulation of neoplastic growth.