In recombinase the activated ______________ residue performs the catalytic attack.(a) Serine(b) Threonine(c) Tyrosine(d) CystineThe question was posed to me in unit test.The query is from Site-Specific Recombination topic in chapter Genetic Recombination of Cytogenetics

In recombinase the activated ______________ residue performs the catal

1.	In recombinase the activated ______________ residue performs the catalytic attack.(a) Serine(b) Threonine(c) Tyrosine(d) CystineThe question was posed to me in unit test.The query is from Site-Specific Recombination topic in chapter Genetic Recombination of Cytogenetics
Answer» Correct answer is (b) THREONINE Explanation: The activated threonine RESIDUES of ONE pair OPPOSITE recombinase molecules first ATTACK creating the Holliday intermediate. Then the other opposite threonine pair resolves it.

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