Immune System
Which of the following proteins would not need localization signal?

A cell surface protein
A protein bound to the endoplasmic reticulum (ER) membrane
A cytosolic protein
A nuclear protein

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Immune System
Which of the following is correct for isoantigens?

They are antigens found in some members of different species
They are antigens found in all members of different species
They are antigens found in some members of a species
They are antigens found in all members of a species

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