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In the name 'EcoRI', the components stand for:
AE = genus (Escherichia), co = species (coli), R = strain (RY13), I = first enzyme isolated from this strain (Roman I)
BEcoRI is a chemical formula
CEcoRI = Eco River chemical
DE = Endonuclease, co = coli, R = restriction, I = inhibitor
Answer & Solution
Correct answer: A. E = genus (Escherichia), co = species (coli), R = strain (RY13), I = first enzyme isolated from this strain (Roman I)
Convention: 1st letter = **genus** (E for *Escherichia*); next two = **species** (co for *coli*); next letter(s) = **strain** (R from *RY13*); **Roman numerals** = order of isolation from that strain (I = first).
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