The CD markers (Cluster of Differentiation) pertaining to cells of the immune system, that are on the cell surface are depicted in textbooks in a linear array.
But a cell has a 3-Dimensional geometry. Thus the arrangement of CD markers exhibits topological features, and it is a misnomer to name it as a cluster.Rather name them as differentiation markers, or more specifically, an Array of Differentiation markers (AD markers). This points to a matrix-like arrangement of cell surface markers as compared to a linear array.
Depending on the sequence of connecting the dots, a different network of markers emerge. Similarly, a different set of CD markers on various cell types will have different 3D topological arrangements. This is simiar to a country with different cities lighted up. Cells to Cities ---> FRACTALS.
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