The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10^-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?

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#Question id: 1670

#XL - Q Biochemistry

The T-cell receptor genes were originally identified using:

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#Question id: 1671

#XL - Q Biochemistry

A chromosome on which T-cell receptor α chain gene rearrangement has occurred lacks which of the following gene segments?

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#Question id: 1672

#XL - Q Biochemistry

Using only random VDJ recombination, from 40 V, 23 D, and 6 J gene segments, what are the number of possible variable regions of an antigen receptor molecule?

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#Question id: 1673

#XL - Q Biochemistry

N-region insertion is associated with the expression of:

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#Question id: 1674

#XL - Q Biochemistry

Which of the following statements is TRUE of receptor editing?

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#Question id: 1675

#XL - Q Biochemistry

Somatic hypermutation of V genes: