Commonly confused

Leucine vs Isoleucine

The tell

Leucine branches at Cγ (late). Isoleucine branches at Cβ (early), which gives it a second chiral center.

Pairs like this are where exam points go missing — the concepts are fine, the labels swap. Retrieval fixes it faster than rereading: the daily quiz mixes confusable pairs into every set.

Today’s daily quiz All confusable pairs