The National Institutes of Health (NIH) has announced a funding opportunity titled "Catalyze: Product Definition for Small Molecules and Biologics - Preliminary Product/Lead Series Identification" under the R33 activity code. This initiative aims to support the early-stage development of therapeutic agents targeting heart, lung, blood, and sleep (HLBS) diseases by facilitating the identification of lead compound series, with a focus on innovative solutions backed by strong biological rationale and preliminary data. The program requires applicants to secure at least a 25% cash match of direct federal costs and to involve an Accelerator Partner for commercialization support, with a maximum funding amount of $350,000 per year for a project period of up to two years. Interested applicants should note that the submission deadline is February 21, 2024, and can reach out to the NIH OER Webmaster at OERWebmaster03@od.nih.gov for further inquiries.