Summary
Profiles the genome or transcriptome of individual cells, revealing hidden heterogeneity.
In depth
Droplet microfluidics (10x Genomics) captures thousands of cells; barcodes track cell origin. It identifies cell types and trajectories and reveals rare populations. Human Cell Atlas aims to map all cell types.
Cell-specific barcodes and unique molecular identifiers allow counting. Clustering and dimension reduction (UMAP) visualise cell types. Lineage tracing follows developmental paths.
Remember: dropout (missing detection) is common due to low RNA amounts per cell.
Bulk sequencing averages signals across millions of cells and can hide important rare types. Single-cell methods capture individual cells in droplets or wells, tag their molecules with barcodes and sequence them.
Single-cell RNA-seq groups cells into types and states, shown on UMAP or t-SNE plots, and can reveal developmental trajectories. Related methods profile chromatin accessibility or DNA mutations and, with spatial technologies, show where cells sit in tissue. Data are sparse and noisy, so computation is vital.
Example: the Human Cell Atlas aims to map every cell type.
Frequently asked questions
What is Single-Cell Sequencing?
Profiles the genome or transcriptome of individual cells, revealing hidden heterogeneity.
Which area of biology covers Single-Cell Sequencing, and how advanced is it?
Single-Cell Sequencing is one of the 56 topics in Biotechnology & Genomics. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Genomics, DNA Sequencing, RNA-Seq.
Why does Single-Cell Sequencing matter?
It reveals tumour heterogeneity and rare cell populations.
Can you give an example of Single-Cell Sequencing?
It uncovered new immune cell subsets.
What should I learn before Single-Cell Sequencing?
Work through the Beginner topics in Biotechnology & Genomics first, such as Biotechnology, Genetic Engineering, Selective Breeding, then return to Single-Cell Sequencing. Advanced topics assume the Intermediate vocabulary.
What topics are related to Single-Cell Sequencing?
The closest topics to Single-Cell Sequencing are Genomics, DNA Sequencing, RNA-Seq, Comparative Genomics. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Single-Cell Sequencing?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Single-Cell Sequencing. To practise the whole of Biotechnology & Genomics, use the Biotechnology & Genomics quiz.
How is Single-Cell Sequencing different from Genomics?
Single-Cell Sequencing: Profiles the genome or transcriptome of individual cells, revealing hidden heterogeneity. Genomics: Study of the full set of genes of an organism and how they interact. Read both side by side and note what each one explains.
How should I study Single-Cell Sequencing step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Genomics and explain the difference aloud. Finally, take the Biotechnology & Genomics quiz and come back to this page for any question you miss.