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what membrane proteins that allow cells to recognize each other?

what membrane proteins that allow cells to recognize each other?

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Carbohydrates: These carbohydrate chains may consist of 2-60 monosaccharide units and can be either straight or branched. Along with membrane proteins, these carbohydrates form distinctive cellular markers, sort of like molecular ID badges, that allow cells to recognize each other.

These markers are very important in the immune system, allowing immune cells to differentiate between body cells, which they shouldn’t attack, and foreign cells or tissues, which they should

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