Fig. 1: Schematic diagram of polymerization in living systems.
From: Nanocompartment-confined polymerization in living systems

a Biological polymerization of monosaccharides, amino acids, and nucleotides for the synthesis of polysaccharides, proteins, and nucleic acids to constitute the elementary components, confer essential functionalities, and modulate the biological process. b Nanocompartment-confined strategy to make a broad spectrum of polymerizations achievable in living systems: exogenous photopolymerization of the sodium salt of 4-styrenesulfonate (NaSS) and endogenous oxidative polymerization of p‑aminodiphenylamine hydrochloride (ADPAH). NIR-II PA imaging second near-infrared photoacoustic imaging, PTI photothermal immunotherapy, PTT photothermal therapy.