Certain integral membrane protein of the erythrocyte was the first membrane protein to be sequenced and is highly glycosylated, a feature which is thought to be responsible for these cells repelling each other and not clumping together in blood vessels. That protein is:.

Glycophorin

Explanation:

The red blood cells possess the membrane-spanning proteins integrated into the cell membrane called glycophorins.

These glycophorins are composed of the sialic acid and the glycoproteins and these molecules allow the formation of the hydrophilic bonds. These molecules allow the easy circulation of the blood cells in the blood vessels without clumping in the vessel and interacting with the blood vessels.

Thus, Glycophorin is correct.

helicase, i think thats it