/* basal_lamina.mdl */

/* The basal lamina surface (book Fig. 4.4A) is a polygon mesh that contains 12994 vertices and 25365 triangular mesh elements. */

basal_lamina POLYGON_LIST { /* This object named "basal_lamina" is instantiated in the main mdl file "rat_nmj.main.mdl". */

VERTEX_LIST {

[ 1.19325, -0.996566, 0.0742573 ] /* position 0 in the vertex list */

/* vertices 1 – 12993 omitted */

}

ELEMENT_CONNECTIONS {

[ 0, 3, 2 ] /* Mesh element 0 */

/* element connections for mesh elements 1-25364 omitted */

}

FULLY_CLOSED = NO

ADD_EFFECTOR { /* Add AChE effector sites. */

STATE = AChE.E /* Molecule name "AChE.E" refers to state "E" within the previously defined "AChE" reaction mechanism. */

DENSITY = 1800 /* 1800 AChE.E molecules per square micron. */

ELEMENT = ALL_ELEMENTS /* Add to all mesh elements. */

POLE_ORIENTATION = POSITIVE_FRONT /* Positive pole on front face of mesh elements. */

}

/* The following two statement blocks make the entire mesh transparent (rather than reflective, the default condition) to diffusing ACh and Ch molecules. */

TRANSPARENT {

LIGAND = ACh

ELEMENT = ALL_ELEMENTS /* To make only part of the mesh transparent to ACh molecules, could have specified individual mesh elements using their position numbers in the element connections list. */

}

TRANSPARENT {

LIGAND = Ch

ELEMENT = ALL_ELEMENTS

}

}