Here is a second human gene, called cxx3. The structure indicates the following: the start and end of transcription, the start codon and the stop codon, the location of the two introns (marked with black boxes). The white boxes indicate the binding locations of two PCR primers. R CD4+ T cells transcriptional start site -PCR CD4+ T cells +1 -PCR CD8+ T cells AIG e markers intron V The researchers carry out a FACS (Fluorescence Activated Cell Sorting) separation of human blood which isolates a relatively pure sample of CD4+ T cells, and a relatively pure sample of CD8+ T cells, both different types of lymphocytes. They carry out a PCR, and a semi-quantitative RT-PCR, on these cell samples. The results are shown on the gel. intron transcriptional stop site Į TAA

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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If there is a three base pair insertion into the cxx3 gene in the location marked by the white
arrowhead, what difference (if any) would you expect to see in Cxx3 protein produced by CD4+ T
cells with this variant gene? Explain. 

Here is a second human gene, called cxx3.
The structure indicates the following: the start and end of transcription, the start codon and the stop
codon, the location of the two introns (marked with black boxes). The white boxes indicate the binding
locations of two PCR primers.
PCR CD4+ T cells
transcriptional
start site
RT-PCR CD4+ T cells
+1
RT-PCR CD8+ T cells
AIG
Size markers
The researchers carry out a FACS (Fluorescence Activated Cell Sorting) separation of human blood which
isolates a relatively pure sample of CD4+ T cells, and a relatively pure sample of CD8+ T cells, both
different types of lymphocytes. They carry out a PCR, and a semi-quantitative RT-PCR, on these cell
samples. The results are shown on the gel.
wells
+.
intron
DNA migration
V
intron
transcriptional
stop site
Į
TAA
Transcribed Image Text:Here is a second human gene, called cxx3. The structure indicates the following: the start and end of transcription, the start codon and the stop codon, the location of the two introns (marked with black boxes). The white boxes indicate the binding locations of two PCR primers. PCR CD4+ T cells transcriptional start site RT-PCR CD4+ T cells +1 RT-PCR CD8+ T cells AIG Size markers The researchers carry out a FACS (Fluorescence Activated Cell Sorting) separation of human blood which isolates a relatively pure sample of CD4+ T cells, and a relatively pure sample of CD8+ T cells, both different types of lymphocytes. They carry out a PCR, and a semi-quantitative RT-PCR, on these cell samples. The results are shown on the gel. wells +. intron DNA migration V intron transcriptional stop site Į TAA
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