Application segmentation dissects the Modified Nucleosides market by end‑use, revealing distinct demand drivers. Therapeutics dominate with roughly 45 % of total revenue, as nucleoside analogues underpin antiviral, anticancer, and immunosuppressive treatments; their high regulatory barriers and premium pricing amplify market weight. Diagnostics account for about 25 %, leveraging modified nucleosides in PCR probes, sequencing kits, and biomarker assays, where rapid adoption and recurring consumable sales sustain growth. Research consumes near 20 % of the market, driven by academic and contract laboratories that require specialized nucleosides for enzymatic studies, structural biology, and synthetic biology; volume is modest but price sensitivity is lower due to grant funding. Agricultural applications represent the remaining 10 %, primarily in plant‑protectant formulations and seed‑treatment technologies that exploit nucleoside‑based signaling pathways. Collectively, these application slices constitute the core of the Modified Nucleosides segmentation, each contributing proportionally to the overall market size through unique cost structures, adoption cycles, and regulatory environments.