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Protocols and Applications Guide (US Letter Size) - Promega

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| 1Nucleic Acid Amplification<br />

Unamplified DNA<br />

Denature <strong>and</strong><br />

anneal primers<br />

Extend primers<br />

Denature <strong>and</strong><br />

anneal primers<br />

Extend primers<br />

Denature <strong>and</strong><br />

anneal primers<br />

Extend primers<br />

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Figure 1.1. Schematic diagram of the PCR process.<br />

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Target Region<br />

Cycle 1<br />

Cycle 2<br />

Cycle 3<br />

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Amplification of short "target" product<br />

More (www.promega.com/pnotes/apps/pcr/)<br />

publications<br />

Online Tools<br />

Amplification Product Selector (www.promega.com<br />

/selectors/amplification/)<br />

Citations<br />

Bermejo-Alvarez, P. et al. (2008) Can bovine in<br />

vitro-matured oocytes selectively process X- or Y-sorted<br />

sperm differentially? Biol. Reprod. 79, 594–7.<br />

To determine whether oocytes are able to select X-bearing<br />

or Y-bearing spermatozoa, the authors performed in vitro<br />

fertilization of bovine oocytes with X-sorted semen,<br />

Y-sorted semen, a mixture of X- <strong>and</strong> Y-sorted semen, <strong>and</strong><br />

unsorted semen. The gender of the resulting embryos was<br />

determined by amplifying two DNA targets: a Y<br />

chromosome-specific target for gender assignment <strong>and</strong> a<br />

bovine-specific satellite sequence as a control. PCRs were<br />

<strong>Protocols</strong> & <strong>Applications</strong> <strong>Guide</strong><br />

www.promega.com<br />

rev. 12/09<br />

Cycles 4–30<br />

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=Short "target" product<br />

=Long product<br />

performed using GoTaq® Flexi DNA Polymerase (1 unit<br />

per 25μl reaction), <strong>and</strong> amplified products were analyzed<br />

by agarose gel electrophoresis followed by ethidium<br />

bromide staining.<br />

PubMed Number: 18579751<br />

Staniszewska, I. et al. (2008) Integrin alpha9 beta1 is a<br />

receptor for nerve growth factor <strong>and</strong> other neurotrophins.<br />

J. Cell Sci 121, 504–13.<br />

The authors investigated the ability of α9β1 integrin to act<br />

as a neurotrophin receptor <strong>and</strong> affect cell signaling<br />

pathways. As part of the study, RT-PCR was used to detect<br />

the presence of other neurotrophin receptors in their model<br />

cell line SW480. Reverse transcription was performed using<br />

the Reverse Transcription System <strong>and</strong> 1μg of total RNA<br />

isolated using the SV Total RNA Isolation System. The<br />

resulting cDNA (5μg) was amplified for 35 cycles (β-actin<br />

1160MA06_5A<br />

PROTOCOLS & APPLICATIONS GUIDE 1-2

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