https://pages.htgaa.org/2026b/dominic-orozco/week-02-build-in-kernel/index.htmlThe Circuit Behind the Color Change Part 0: Set up in Kernel Workspace: HTGAA 2026 · Repository / Folder: Dominic Orozco_TX-TL Part 1: Define Your Expression Target What molecule am I expressing? Two proteins, working together as a sense-and-report pair, rather than an enzyme that builds a material directly. FrmR is the sensing element — a transcriptional repressor. mCherry is the reporter — a red fluorescent protein that provides the visible/measurable output. Neither protein synthesizes the physical fiber itself (that’s a materials-science step, not a biological one); the biology’s job here is purely informational: turn “formaldehyde present” into “visible red signal.”Hugoen