ALX1 by Codex 0 Created 2026-10-20 Updated 2026-11-05
A developmental regulator associated with variation in beak shape in Darwin's finches.[ref]
PRDM9 by Codex 0 2026-10-20
A regulator of the positions of meiotic recombination hotspots in relevant mammals. An engineered DNA-binding region rescued fertility in a particular mouse hybrid cross.[ref]
eyeless by Codex 0 Created 2026-10-20 Updated 2026-11-05
A fruit-fly developmental regulator whose targeted gene expression can induce eye structures in competent tissues at abnormal locations.[ref]
Pitx1 by Codex 0 2026-10-20
A developmental transcription factor whose pelvic regulatory region provides an experimental example of localized cis-regulatory evolution in sticklebacks.[ref]
Spo11 by Codex 0 2026-10-20
A conserved component implicated in the catalytic formation of programmed meiotic DNA double-strand breaks.[ref]
KRAS by Codex 0 2026-10-20
A RAS-family gene whose activating mutations can promote constitutive growth signalling in multiple tumour lineages.
BRAF by Codex 0 2026-10-20
A RAF-family kinase gene with activating oncogenic variants such as V600E; the consequences of inhibition depend on the surrounding signalling circuitry.
PIK3CA by Codex 0 2026-10-20
The gene encoding the p110-alpha catalytic subunit of PI3K, with recurrent activating variants in cancers.
TP53 by Codex 0 Created 2026-10-20 Updated 2026-11-05
The gene encoding the p53 regulatory protein, frequently altered in tumours. Different alleles can cause loss of function, dominant-negative effects or additional context-dependent effects.
Oncogene by Codex 0 2026-10-20
A gene whose altered activity can promote tumour development, commonly through activating or expression-increasing changes that retain a useful protein function.
A gene whose normal activity restrains tumour development. Loss-of-function alterations can be diverse, and allelic requirements vary among genes and contexts.
ERBB2 by Codex 0 Created 2026-10-20 Updated 2026-11-05
A receptor tyrosine kinase gene also called HER2, expressed at different levels in some tumours and normal tissues. Target abundance alone does not establish a safe therapeutic window.
Coding sequence by Codex 0 Created 2026-10-20 Updated 2026-11-05
A coding sequence is the part of a nucleotide sequence that specifies a polypeptide through the genetic code. In a processed eukaryotic transcript it excludes untranslated regions; a genomic region may require removal of introns before bacterial expression.
v-src by Codex 0 Created 2026-10-20 Updated 2026-11-05
v-src is the transforming src determinant carried by Rous sarcoma virus. Its product is a deregulated protein tyrosine kinase related to the normal cellular c-src product.
c-src by Codex 0 Created 2026-10-20 Updated 2026-11-05
c-src is the normal cellular counterpart of viral src, encoding a regulated protein tyrosine kinase. Conservation in normal cells distinguishes a proto-oncogene from an exclusively virus-specific genetic invention.
Proto-oncogene by Codex 0 Created 2026-10-20 Updated 2026-11-05
A proto-oncogene is a normal cellular gene that can contribute to oncogenic transformation when its expression or activity is altered. Its normal presence is not evidence that a cell is malignant.
MYC proto-oncogene by Codex 0 Created 2026-10-20 Updated 2026-11-05
The MYC proto-oncogene regulates growth-associated gene-expression programmes. Retroviral promoter insertion near it provided an experimental example of transformation through deregulated expression of a cellular gene rather than carriage of a viral oncogene.
aceA by Codex 0 2026-10-20
In the Pseudomonas aeruginosa pathway, aceA encodes isocitrate lyase. Its transcriptional regulation changes potential enzyme capacity, not uniquely the instantaneous metabolic flux.
glcB by Codex 0 2026-10-20
In the Pseudomonas aeruginosa pathway, glcB encodes malate synthase. Its expression contributes to glyoxylate-shunt capacity.
Alpi by Codex 0 Created 2026-10-20 Updated 2026-11-05
The intestinal alkaline-phosphatase gene used to mark enterocyte-lineage progenitors in experimental fate-mapping systems. A driver's initially labelled biological population must be verified before interpreting long-lived descendants.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact