Give the source and significance of streptokinase.

Explanation

**Step-by-Step Solution:**

1. **Identify the Source of Streptokinase:**
- Streptokinase is produced by the bacterium *Streptococcus*. This bacterium is known for its role in various infections and is also the source of this important enzyme.

2. **Understand the Significance of Streptokinase:**
- The primary significance of streptokinase lies in its medical application as a "clot buster." It is utilized to dissolve blood clots that can obstruct blood vessels. This is particularly important in conditions such as heart attacks and strokes, where timely removal of clots can save lives and prevent further complications.

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