dropsynth.org

What It Is

DropSynth is a gene synthesis method invented by the Kosuri Lab at UCLA and further developed by the Plesa Lab at UOregon. It is not an online course in the conventional sense, but rather an open-source experimental method and resource library for researchers in synthetic biology and molecular biology. Its core idea is to use microarray-derived oligonucleotides and barcoded beads to assemble thousands of genes in parallel in a single pot, inside water-in-oil droplets generated by vortex emulsification.

Key Dimensions

• Subject area: A cutting-edge experimental method in synthetic biology and molecular biology.
• Format and resources: Mainly documentation protocols, open-source software, sequence data, and recorded demonstration videos on Vimeo. It follows a typical open-science research resource model, with no live classes or 1-on-1 guidance.
• Instructor/institution background: Backed by leading academic institutions, UCLA and UOregon. Related work has been published in top-tier journals such as Science, giving it very strong academic credibility.
• Best suited for: Researchers with a solid foundation in molecular biology lab work, especially teams that need to build large-scale gene libraries for high-throughput screening.

Pricing Model

The DropSynth method and protocols are free and open source, but implementation requires reagent costs. Preparing the initial 384 barcoded bead pools costs about USD 3,400, enough for roughly 200 reactions, equivalent to around USD 0.04 per gene. Oligonucleotides and other reagents cost about USD 1–2 per gene. Compared with traditional gene synthesis priced at several cents per base, DropSynth offers a significant cost advantage for large-scale library construction. In addition, SynPlexity now provides commercial services, which is convenient for labs that do not want to build the workflow themselves.

Pros and Cons

• Pros: Dramatically lowers the cost of large-scale gene synthesis; efficient high-throughput single-pot assembly; reagents can be sourced from mainstream suppliers such as Agilent, Twist, and IDT, making procurement relatively accessible.
• Cons: The error rate is relatively high. For assemblies of 4–5 oligonucleotides, only about 20–30% are perfect, and enzymatic error correction is difficult inside droplets. It is not suitable for scenarios where individual genes need to be separately extracted and tested. The upfront cost of bead preparation is also relatively high and requires a certain level of experimental skill.

Who It Is For / Not For

DropSynth is suitable for researchers who need to construct thousands to tens of thousands of gene variants and have access to inexpensive downstream multiplexed functional screening methods, such as selection experiments or high-throughput sequencing-based evaluation. It is not suitable for use cases that require high-fidelity monoclonal genes or for labs that lack automated equipment for extracting individual genes.

Access in China and Alternatives

• Network and payment: The website is a .org academic resource site and is directly accessible from China. For payments, if purchasing reagents independently, standard research reagent procurement channels, such as distributors, can be used. If using SynPlexity’s commercial service, payment options depend on its specific policies.
• Alternatives: Traditional commercial gene synthesis services, such as gene synthesis from Twist Bioscience or IDT, which cost more but offer better fidelity; other multiplex DNA assembly technologies.