The faculty members come from across the state, including secular and religious institutions. The action by these profs follows support for Comer from Babara Forrest, the presenter of that talk.
Several biology professors have signed a letter [PDF] supporting Chris Comer. Comer recently resigned as Texas' director of science education, purportedly under duress resulting from her advertisement of a talk on evolution. The letter says in part that the state has a "duty to keep intelligent design out of public school science classes."