What is found in digestive emzymes

Proteins are the building blocks of most biological chemicals. All enzymes are made of proteins but are synthesized in different ways. So the answer is proteins

Digestive enzymes of diverse specificities and are found in the saliva secreted by the salivary glands, in the secretions of cells lining the stomach, in the pancreatic juice secreted by pancreatic exocrine cells, and in the secretions of cells lining the small and large intestines.