Bid is an abundant pro-apoptotic protein of the Bcl-2 family that is crucial for death receptor-mediated apoptosis in many cell systems.
The expression of BID can serve as a prognostic marker in several cancers. Higher levels of BID are often associated with increased apoptosis and better treatment responses, while lower levels may indicate resistance to therapy and poorer outcomes.
Generation of Truncated Bid (tBid):
• When apoptosis is signaled, specific proteases (such as caspase-8) cleave full-length Bid into its truncated form, tBid.
• tBid is the active form that translocates to mitochondria.
So "the truncation of Bid" means that the protein has been converted into an active form (tBid) that supports apoptosis.
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