Name an amino acid used to build proteins: rare answers

There are 22 correct answers to “Name an amino acid used to build proteins” on our list. The obvious ones, like Tryptophan, Arginine and Glycine, are worth 10 points each; the rare ones, like Isoleucine, Asparagine and Threonine, are worth far more.

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The rarest answers

This list has no Abyssal tier, so the Midnight Zone is as deep as it goes: Isoleucine, Asparagine, Threonine, Selenocysteine and Pyrrolysine, worth 85 points each.

Rarity tiers are our own estimate of how few people would think of each answer. For strategy, read how to find One in a Krillion answers.

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• Think past the first answer

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