Biomaterials are important in catalysis for several reasons: 1. Biocompatibility: They are often non-toxic and environmentally friendly. 2. Specificity: They can exhibit high specificity towards substrates, leading to fewer side reactions and higher yields. 3. Mild Conditions: They can often operate under relatively mild conditions of temperature and pH, which is beneficial for preserving the integrity of sensitive substrates. 4. Sustainable: Many biomaterials are derived from renewable resources, aligning with the goals of green chemistry and sustainability.