Table 2.
Forces used for element to element and element to membrane interactions. Column 1 lists the force being described. Column two is the equation used to calculate the force, where r is the distance between elements or between an element and the basement membrane. Column 3 gives the distance at which a force is set to zero because the interaction is out of range. Column 4 gives the equilibrium separation resulting from the force. Column 5 gives the maximum attractive strength that the force attains.
| force | equation | cut-off distance | equilibrium separation | maximum attraction |
|---|---|---|---|---|
| basal cell element (basal) to membrane | 30((2.512/r14) − 1) | none | 2.19 | 30 |
| basal cell element (apical) to membrane | min(0.04 − 0.005r, 0) | none | 8 | 0 |
| suprabasal element to membrane | min(3 − 0.5z, −0.1) | none | 6 | 0.1 |
| basal cell element to basal cell element (same type, intracellular) | ((2.212/r14) − (2.23/r3)) | none | 1.91 | 0.794 |
| basal cell element to basal cell element (same type, intercellular) | 0.001 ((2.512/r14) − (2.56/r8)) | 3.5 | 2.5 | 3.25 × 10−5 |
| basal cell element to basal cell element (cross type, intracellular) | 0.8 ((312/r14) − (36/r6)) | none | 2.28 | 1.26 |
| basal cell element to basal cell element (cross type, intercellular) | 0.0002 ((3.512/r14) − (3.56/r8)) | 5.5 | 3.5 | 3.32 × 10−6 |
| suprabasal cell element to suprabasal cell element (intracellular) | 2((2.012/r14) − 1) | none | 1.81 | 1 |
| suprabasal cell element to suprabasal cell element (intercellular) | ((3.212/r12) − (3.23/r3)) | 3.8 | 3.2 | 0.472 |
| suprabasal cell element to basal cell element (intercellular) | ((2.012/r12) − 1) | none | 2.0 | 1 |
| suprabasal cell element to basal cell element (intercellular) | ((4.312/r12) − (4.33/r3)) | 5.5 | 4.3 | 0.472 |