Final answer:
CARD or PYRIN domains recruit caspases, which are crucial enzymes involved in apoptosis and inflammation, to form inflammasomes.
Step-by-step explanation:
The domains referred to as CARD (Caspase Recruitment Domain) or PYRIN are specialized protein interaction motifs found within certain proteins that play a role in apoptosis and inflammation. These domains are responsible for recruiting other protein factors to facilitate the signaling cascades that lead to these processes. Particularly, they recruit B) Caspases, which are a family of protease enzymes playing essential roles in programmed cell death (apoptosis) and inflammation. CARD domains directly interact with caspases to form large signaling complexes known as inflammasomes, which are critical in the innate immune response.