18. Cell Junctions and Tissues

In the context of cell-cell adhesion, which molecules are primarily involved in cell-to-cell recognition and specific binding between neighboring animal cells?

In the context of cell-cell adhesion, which cell-surface molecules are primarily responsible for cell-to-cell recognition during tissue formation and immune interactions?

Which class of cell-surface molecules is most directly involved in cell-to-cell recognition by displaying diverse extracellular carbohydrate patterns (e.g., ABO blood group antigens)?