Final answer:
The substance not found in saliva is a cyanide derivative. Saliva contains various other components such as salivary amylase, lysozyme, and immunoglobulin A, which play roles in digestion, antimicrobial defense, and pathogen protection respectively.
Step-by-step explanation:
The component of saliva that is not found in its makeup is a cyanide derivative. Saliva is primarily composed of water (95.5 to 98 percent) and the remaining composition includes a variety of substances such as ions, glycoproteins, enzymes, and growth factors that have specific functions. Important components include salivary amylase for breaking down carbohydrates, bicarbonate and phosphate ions for maintaining pH, salivary mucus for lubrication, immunoglobulin A for pathogen defense, and lysozyme for its antimicrobial properties. Therefore, the correct answer is A) a cyanide derivative, as it is not a component normally found in saliva.