How does the Kell blood group system affect the expression of Kell antigens on red blood cells?

A It is a glycosyltransferase enzyme that adds carbohydrate molecules to the Kell protein ✓
B It is a proteolytic enzyme that cleaves the Kell protein into smaller fragments
C It is a chaperone protein that assists in the proper folding of the Kell protein
D It is a transmembrane protein that anchors the Kell protein to the red blood cell membrane

Explanation

The Kell blood group system is characterized by the presence of a glycosyltransferase enzyme that adds carbohydrate molecules to the Kell protein, which is a transmembrane protein on red blood cells. This enzyme is responsible for the expression of Kell antigens on the surface of red blood cells.

Source

Scientific literature on blood group systems
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: medium