1. Lysosomes are known to contain more than 60 different enzymes
2. Have more than 50 membrane proteins: Hydrolytic enzymes, including proteases, nucleases, glycosidases, lipases, phospholipases, phosphatases, and sulfatases
3. Produced by RER via golgi then small vesicles
4. A mannose 6-phosphate is a sorting signal specifically tagging proteins for lysosomes
5. Lysosomes are very heterogeneous (amen….considering those in liver cells containing perflurochemical emulsion particles)