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Continue to ChatAs for the presence of large NGF [nerve growth factor] sources in snake venom and male genital organs, they may be conceived as instances of bizarre evolutionary gene expression. - Rita Levi-Montalcini from https://whatsmyquote.com/quote/as-for-the-presence-of-large-ngf-nerve-growth-factor-sources-in-snake-venom-and-male-genital-organs-they-may