BCAPB LLC Trust 2007-Ab1 Sample Contracts

EXHIBIT 4 BCAPB TRUST LLC 2007-AB1 MORTGAGE PASS-THROUGH CERTIFICATES SERIES 2007-AB1 TRUST AGREEMENT

Trust Agreement • August 3rd, 2007 • BCAPB LLC Trust 2007-Ab1 • Asset-backed securities • New York

• Contract Type
  Trust Agreement
• Filed
  August 3rd, 2007
• Company
  BCAPB LLC Trust 2007-Ab1
• Industry
  Asset-backed securities
• Jurisdiction
  New York

BCAP LLC $546,526,000 (Approximate)

BCAPB LLC Trust 2007-Ab1 • August 3rd, 2007 • Asset-backed securities • New York

• Company
  BCAPB LLC Trust 2007-Ab1
• Filed
  August 3rd, 2007
• Industry
  Asset-backed securities
• Jurisdiction
  New York