by Bethan Wolfenden, MSci, co-founder of Bento Bio
Five hours from the nearest laboratory, conservationists working in the Himalayas to save one of the world's rarest birds needed answers quickly.
The critically endangered white-bellied heron is estimated to number fewer than 70 individuals in the wild. For breeding and conservation programs, knowing the sex of individual birds is essential.
Traditionally, genetic samples would need to be transported to laboratories abroad for analysis, introducing delays and logistical challenges. Instead, researchers brought the laboratory with them, using portable molecular biology equipment to perform bird sexing closer to the field site.
"Having these capabilities available in the field can make conservation efforts more efficient and impactful," said researcher Pema Khandu. "Genetic sexing and eDNA analyses can be carried out within just a few hours, bringing science closer to the landscapes and species we aim to conserve."
This is a powerful example of a broader trend reshaping life sciences research. Molecular biology is increasingly moving beyond centralized facilities and into the environments where biological questions arise.
From biodiversity surveys and environmental DNA (eDNA) monitoring to disease surveillance, agriculture, food authenticity, and industrial microbiology, scientists are increasingly taking PCR and DNA analysis closer to the point of need.
Why bring molecular biology closer to the point of need?
For decades, molecular biology workflows followed a familiar pattern: Researchers collected samples in the field, transported them to a laboratory, and waited days or weeks for DNA extraction, PCR amplification, sequencing, and analysis.
While this model remains essential for many applications, it presents challenges. Samples can degrade during transport, particularly in environments where maintaining a cold chain is difficult. Researchers may only discover after returning home that DNA quality was poor, a protocol failed, or additional samples were needed. These testing delays slow progress and postpone important decisions.
Portable molecular biology addresses these challenges by allowing researchers and technicians to generate molecular data closer to where samples are collected.
The value of portable molecular biology is not simply portability. It is the ability to turn biological samples into actionable information while there is still time to respond.
For marine biologist Sunni Patton, this capability proved critical during coral research in the Florida Keys, where she set out to investigate Aquarickettsia rohweri, a bacterium threatening coral health.
She had originally planned to use young corals without the bacteria to examine waterborne and vector-borne routes of transmission. But once in the field, the data told a different story.
Rather than losing days to an unproductive sampling strategy, she was able to adapt her experimental design in real time.
"It was really nice to be able to get immediate answers," Patton said. "I could decide how long to extend my experiment, or whether to change direction entirely."
Building skills alongside research
Portable molecular biology is also creating new opportunities for teaching and workforce development. Students can now learn molecular techniques in workshops, ecological field courses and other outdoor educational settings, rather than exclusively within traditional teaching laboratories.
Bachelor's student Molly Doyle experienced this first-hand while developing field-based environmental DNA assays to detect endangered European eels and invasive signal crayfish in England. By combining portable equipment with rapid LAMP assays, Molly was able to validate workflows in the field while developing practical molecular biology skills that would have been much harder to acquire using conventional laboratory infrastructure.
Technologies enabling the shift
Several technological developments have converged to make portable molecular biology increasingly practical.
Portable PCR systems have become smaller, lighter, and more robust. Paired with mobile sequencing technologies, multi-function units that include a thermal cycler, centrifuge and gel box have enabled teams to create entire field labs that fit in a carry-on suitcase. At the same time, simplified DNA extraction methods and more stable, field-ready reagents have further reduced dependence on dedicated laboratory infrastructure.
The result is a growing ecosystem of tools that enables researchers to conduct key molecular biology workflows wherever samples are collected, allowing them to validate samples, troubleshoot protocols, and generate preliminary results before sending selected samples for deeper laboratory analysis.
Biodiversity monitoring moves closer to nature
One of the fastest-growing applications of portable molecular biology is biodiversity monitoring.
DNA barcoding has become an indispensable tool for species identification, conservation research, and ecological surveys. Yet many biodiversity projects still depend on centralized laboratories located hundreds or thousands of kilometres from field sites.
Researchers from the National University of Singapore demonstrated an alternative approach by combining portable PCR equipment with nanopore sequencing technology to perform DNA barcoding aboard a dive vessel. Within hours of collecting marine specimens, the team had extracted DNA, amplified barcode regions, and generated species-identification data while still at sea.
Environmental DNA is another rapidly growing application. By analyzing traces of DNA found in water, soil, or air, researchers can detect organisms without directly observing or capturing them. Portable PCR workflows are helping teams assess biodiversity, monitor ecosystem health, and evaluate sampling success before leaving the field.
Beyond ecology
The shift toward distributed molecular biology is not limited to ecology.
In agriculture, portable PCR workflows are increasingly being used for biosurveillance, allowing researchers to screen for crop pathogens and pests closer to where outbreaks occur.
In poultry breeding, genetic sexing methods allow breeders to determine chick sex rapidly and accurately, helping optimize breeding programs and reducing uncertainty.
Food authenticity is another growing area of application. DNA analysis can verify the botanical and geographic origins of foods ranging from fish and honey to olive oil. By confirming species identity and detecting adulteration, molecular techniques are helping producers and regulators protect supply chains and consumer confidence.
Even smaller commercial operations are beginning to adopt molecular biology. Craft brewers, for example, are using DNA-based approaches to characterize yeasts and microbial communities involved in fermentation.
These examples illustrate a broader trend: Molecular biology is moving beyond specialist facilities and becoming a practical tool wherever biological information can improve outcomes.
The future of molecular biology will not be defined solely by smaller instruments or faster sequencing platforms. It will be defined by how effectively molecular workflows can be distributed to the people and places where biodiversity, conservation, agriculture, food safety, and public health challenges occur.
5 Practical Tips for Setting Up a Field Molecular Biology Lab
Successful field molecular biology depends as much on logistics as it does on technology. Before heading into the field, consider these practical factors:
1. Plan your workspace
Choose a clean, stable work surface and account for environmental conditions. Temperature, humidity, and weather can all affect samples and reagents. Consider room-temperature-stable reagents, hot-start PCR chemistries, and appropriate sample storage strategies when working in challenging environments. Protect work areas with disposable coverings or cleanable trays.
2. Think about power early — and rehearse before deployment
Power requirements are often the most overlooked aspect of field deployments. Confirm access to mains electricity, generators, or portable power stations before departure. Run the complete workflow in advance, verify that equipment is functioning correctly, and prepare contingency plans for common issues such as reagent shortages, power interruptions, or contamination events.
3. Organize equipment and reagents carefully
Use labelled containers, packing lists, and dedicated storage systems. Keeping equipment organised reduces setup time and lowers the risk of losing critical supplies. And bring extras! Fieldwork rarely goes perfectly to plan.
4. Separate pre-PCR and post-PCR materials
Maintaining physical separation between DNA extraction and PCR setup materials and amplified PCR products is essential to minimise contamination risks.
5. Prepare for gel electrophoresis
If microwave access is unavailable, consider alternatives such as pre-cast gels, portable heating methods, or field-compatible gel preparation approaches.
About the Author
Bethan Wolfenden is co-founder of Bento Bio, where she helped pioneer Bento Lab — an all-in-one DNA workstation designed for field diagnostics and accessible molecular workflows. She studied Biochemistry at University College London and is deeply passionate about expanding global access to practical science education and PCR.