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Table 1 Spatial partitioning scheme of epidermal tissue layers

From: Regulation of ERK-MAPK signaling in human epidermis

 

Layer-normalized distance

 

0–1

1–2

2–3

Total spatial partitions

Basal layer

Spinous and granular layers

Transitional layer

7

1

2–5

6 & 7

28

1–4

5–20

21–28

  1. The layer-normalized distance was converted from a continuous measure along the gradient of keratinocyte terminal differentiation into a discrete number of ‘spatial partitions’ as illustrated in Fig. 2c. These spatial partitions better reflect the relative number of cells within each layer, with a ratio of 1:4:2; one basal cell, four spinous and granular cells and two transitional cells