Final answer:
Factor XIIIa stabilizes the fibrin clot in the coagulation cascade.
Step-by-step explanation:
Factor XIIIa differs from the other enzymes of the coagulation cascade in that it is responsible for stabilizing the fibrin clot. While other enzymes in the cascade are involved in the activation of factors that lead to the formation of fibrin, factor XIIIa works to cross-link the fibrin strands, making the clot more stable and resistant to breakdown.
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