Appendix 1—table 6. Perturbing the trans-acting step in the parallel activation model.

Parameter	Description
$k_c$	cis-activation rate
$k_f^0=k_T(1-d)$	trans-activation rate, from non-expressing/mono-allelic state
$k_f^1=k_T(1-f\cdot d)$	trans-activation rate, from bi-allelic state
$k_r^0=k_T\cdot d$	back trans-activation rate, from non-expressing/mono-allelic state
$k_r^1=k_T\cdot f\cdot d$	back trans-activation rate, from bi-allelic state
$d$	0 to 0.65
$f$	0.2