Building a cell simulator -- a biological, in-your-tissues cell, where the lowest simulated elements are exons (E), introns (I), expressed exons (Ee) and protein domains (PD), with cube-wise compartmentalization of membranes and intracellular space which contain chains of E+I, Ee, and PDs, and concentration functions for microelements like phosphates.

I wrote it in C++ and when launched with very downsized dimensions, it ate up 6 Gb of RAM and crashed with out of memory. I may try again when I can afford several hundred Gb of RAM.