Annotations: 9B2W

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth D]	e9b2wD01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F:	ECOD (v294.1)
C [auth B]	e9b2wB01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F:	ECOD (v294.1)
D [auth C]	e9b2wC01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F:	ECOD (v294.1)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth B], E	Heavy Chain	IGHV3	-	hemagglutinin-neuraminidase	SAbDab (2026-03-27)
D [auth C], F	Light Chain	IGKV2	Kappa	hemagglutinin-neuraminidase	SAbDab (2026-03-27)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth D], B [auth A]	Hemagglutinin-neuraminidase	hydrolase activity, acting on glycosyl bonds alpha-sialidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity exo-alpha-sialidase activity catalytic activity host cell surface binding binding host cell surface receptor binding	virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host	virion component viral membrane viral envelope host cell plasma membrane host cellular component cellular anatomical structure host cell part host cell membrane other organism part virion membrane
C [auth B], E	Fab 13 Heavy Chain	-	-	-
D [auth C], F	Fab 13 Light Chain	-	-	-

Chains	Accession	Name	Type
A [auth D], B [auth A]	IPR016285	Haemagglutinin-neuraminidase	Family
A [auth D], B [auth A]	IPR036278	Sialidase superfamily	Homologous Superfamily
A [auth D], B [auth A]	IPR000665	Haemagglutinin/haemagglutinin-neuraminidase, paramyxovirus	Family