Genome engineering

Base editors (CBE/ABE) make single-nucleotide changes C·G→T·A and A·T→G·C without double-strand breaks — treating monogenic disease (sickle cell, beta-thalassemia) at up to 90% efficiency with no indels.

Physical-containment infrastructure — biological safety cabinets, HEPA filtration, autoclave sterilization and BSL-1 to BSL-4 containment — that protects personnel, product and environment in every biotechnology laboratory, governed by NSF/ANSI 49 and EN 12469.

Contract functional-genetic CRISPR screening (pooled sgRNA libraries, lentiviral delivery, NGS) — identifies cancer-resistance genes and drug targets in weeks.

Deliberately engineering whole wild populations — from CRISPR gene drives that force 100% inheritance of a trait through a mosquito population in 6-20 generations to Wolbachia-infected and radiation-sterilized releases that collapse it instead — as a genetic complement to nature-based ecological engineering like constructed wetlands and living shorelines, all governed by an irreversibility problem no field release can undo.

Turning genes on or off by rewriting DNA methylation and histone marks with dCas9 fusion proteins or zinc fingers — no DNA sequence change, but an effect that can be inherited across cell divisions.

Programmable genome editors — CRISPR-Cas9, base editors and prime editors — delivered ex vivo or in vivo via lipid nanoparticles to treat genetic disease, from the first approved CRISPR therapy Casgevy to in-vivo redosable CRISPR and single-dose cardiovascular base editing.

Synthetic gene circuits that force engineered organisms to depend on external chemical signals for survival, self-destructing or losing viability once released into the environment — the biocontainment standard now required before any regulator clears a synthetic-biology product for open-system field trials.

The frontier of building life de novo — stripping genomes down to a minimal viable chassis (top-down) and assembling artificial cells from non-living parts (bottom-up) to make predictable, biocontained cell factories.

Search-and-replace genome editing with a Cas9 nickase fused to a reverse transcriptase and an extended pegRNA — writing all 12 base substitutions and small indels without a double-strand break.

The engineering of biology — designing DNA, cells and genetic circuits on computers, building them in biofoundries and scaling them into chemicals, materials and ingredients through the Design-Build-Test-Learn cycle.

Orthogonal biological systems built on xeno-nucleic acids, unnatural base pairs and genomically recoded organisms that incorporate noncanonical amino acids into proteins — enabling site-specific drug conjugation and a genetic firewall against horizontal gene transfer with wild species.