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Pick odd one out. (a)Histidine

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in Enzyme Technology by (55.0k points)
Pick odd one out.

(a) Histidine

(b) Cysteine

(c) Threonine

(d) Tyrosine

I got this question in an online interview.

My query is from Enzymes Purification topic in portion Enzymes Purification of Enzyme Technology

1 Answer

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Right option is (a) Histidine

Explanation: Histidine is odd one out as it is a basic amino-acid. If the side chain attached is a basic group, the amino-acid is called basic amino-acid. Cysteine, threonine and tyrosine are neutral amino acids. If the sidechain attached has no extra basic or acidic group, the amino-acid is referred to as neutral amino-acid.

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