What is the primary mechanism by which the Kell blood group system antigens are anchored to the red blood cell membrane?

A Transmembrane domain ✓
B Glycosylphosphatidylinositol anchor
C Cysteine residues
D N-glycosylation

Explanation

The Kell blood group system antigens are anchored to the red blood cell membrane through a transmembrane domain.

Source

Lecture Notes in Hematology
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: high