Abstract
The preparation of crystalline rennin is summerized in the scheme mentioned above. Under this, conditions rennin crystallizes in the form of needles. The melting point of the crystals is 225-227°C (decompose). The cristals are easily dissolved in water, diluted hydrochloric acid or dilute salt solutions into a watery, clear, colorless and viscous solution. The milkclotting power of crystalline rennin is 1.0×107 units, buthas little proteolytic power.
