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Related Party Transactions | 3 Months Ended
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Mar. 31, 2024
Related Party Transactions [Abstract] |
Related Party Transactions | 12. Related Party Transactions As of March 31, 2024 and December 31, 2023, the Company was obligated to pay Amgen $6.3 million and $3.1 million, respectively, under the Amgen Collaboration Agreement, which was recorded within current liabilities on the condensed consolidated balance sheets. As of March 31, 2024 and December 31, 2023, $9.4 million and $6.3 million, related to amounts prepayable to Amgen were recorded as prepaid expenses and other current assets on the condensed consolidated balance sheets. During the three months ended March 31, 2024 and 2023, the Company recorded nil and $8.1 million, respectively, of research and development expenses with Amgen.

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