35UH | pdb_000035uh

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, E, H, K, N B, E, H, K, N, Q	Light Chain	IGLV1	Lambda	tissue factor pathway inhibitor	SAbDab (2026-06-05)
A, D, G, J, M A, D, G, J, M, P	Heavy Chain	IGHV3	-	tissue factor pathway inhibitor	SAbDab (2026-06-05)

Chain	Name	Target	Provenance Source
B, E, H, K, N B, E, H, K, N, Q	Marstacimab	ERBB2/CD340/HER2	Therapeutic SAbDab (2026-06-05)
A, D, G, J, M A, D, G, J, M, P	Marstacimab	ERBB2/CD340/HER2	Therapeutic SAbDab (2026-06-05)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, F, I, L, O C, F, I, L, O, R	Tissue factor pathway inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	multicellular organismal process regulation of body fluid levels wound healing response to stimulus hemostasis biological regulation blood coagulation response to stress coagulation regulation of biological quality response to wounding	-
B, E, H, K, N B, E, H, K, N, Q	TFPI-23-Fab Light chain	-	-	-
A, D, G, J, M A, D, G, J, M, P	TFPI-23-Fab Heavy chain	-	-	-

Chains	Accession	Name	Type
C, F, I, L, O C, F, I, L, O, R	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
C, F, I, L, O C, F, I, L, O, R	IPR008296	Tissue factor pathway inhibitor-like	Family
C, F, I, L, O C, F, I, L, O, R	IPR050098	Tissue factor pathway inhibitor/Kunitz-type serine protease inhibitor-like	Family
C, F, I, L, O C, F, I, L, O, R	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
C, F, I, L, O C, F, I, L, O, R	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.