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A stealth-mode startup backed by one of Boston’s biggest venture capital firms, Flagship Pioneering, is planning to graduate from shared lab space to a much larger leased lab in Kendall Square, and is expecting to more than triple its staff by 2020, according to new details made public for the first time Thursday.

The company — still referred to by its stealth-mode moniker “VL49” — is one of several new startups trying to leverage three buzzy technologies: artificial intelligence, CRISPR, and single-celled sequencing.

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