Contact

Found a bug, spotted a wrong formula, or want a tool added? Email keonazadi1@gmail.com and it gets read.

If something is wrong

Please say so, even if you are not certain. Errors here get fixed quickly, usually the same day, and the person who caught it gets credited on the thing they corrected. The enzyme inhibition chart carries a reader's name in its footer for exactly that reason: they pointed out that mixed inhibition is a continuum rather than one fixed signature, they were right, and the chart is better for it.

What helps most is the specific number or claim you think is off, and the page it is on. A source is welcome but not required, and disagreeing with a textbook is fine as long as you say which one.

If you want a tool that is not here

Say what you were trying to work out and where the existing tools fell short. That is more useful than a feature name, because it usually turns out an existing page needs fixing rather than a new one being built.

If you teach, or run a library guide

The printable charts are released under CC BY 4.0, so they can be printed, handed out, posted on a course page or added to a guide without asking. If a chart would be more useful to your students with something added or changed, that is worth an email. Several of them exist in their current form because someone asked.

What this site is

Free biochemistry, genetics and chemistry tools that show the method rather than just the answer. No accounts, no paywalls. More on the about page.