Here's why:

* Myosin has a globular head and a long, fibrous tail. The globular head contains the ATPase activity.

* ATPase is the enzyme that hydrolyzes ATP into ADP and inorganic phosphate. This hydrolysis releases energy which powers the movement of myosin along actin filaments during muscle contraction.

Therefore, while the ATPase enzyme is found in the globular portion of myosin, it's not the entire globular portion itself. The globular head is a complex structure that includes multiple domains, with the ATPase site being a specific region within that head.