# 5. Analysis of feed forward loops¶

Design principles

• The C1-FFL with AND logic has an on-delay, but no off-delay.

• The C1-FFL with OR logic has an off-delay, but no on-delay.

• The C1-FFL with both AND and OR logic can filter out short input impulses.

• The I1-FFL with AND logic is a pulse generator and also speeds response compared to an unregulated circuit.

Concept

• When multiple factors regulate a single gene, we need to specify the logic of the regulation, usually OR or AND.

[1]:

import numpy as np
import scipy.integrate

import biocircuits

import bokeh.io
import bokeh.plotting

import colorcet

import panel as pn

bokeh.io.output_notebook()
pn.extension()

colors = colorcet.b_glasbey_category10