Annotations: 4X0J

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EUF08189	e4x0jA1	A: alpha duplicates or obligate multimers	X: Haptoglobin-hemoglobin receptor (From Topology)	H: Haptoglobin-hemoglobin receptor (From Topology)	T: Haptoglobin-hemoglobin receptor	F: EUF08189	ECOD (1.6)
B	EUF08189	e4x0jB1	A: alpha duplicates or obligate multimers	X: Haptoglobin-hemoglobin receptor (From Topology)	H: Haptoglobin-hemoglobin receptor (From Topology)	T: Haptoglobin-hemoglobin receptor	F: EUF08189	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1260.80	Mainly Alpha	Up-down Bundle	Ferritin		CATH (4.3.0)
B	1.20.1260.80	Mainly Alpha	Up-down Bundle	Ferritin		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF20933	Haptoglobin-hemoglobin receptor (HpHbR)	Haptoglobin-hemoglobin receptor	-	Family

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR049462	Haptoglobin-hemoglobin receptor	Family

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.