Format

Send to:

Choose Destination
See comment in PubMed Commons below
Nucleic Acids Res. 1990 Sep 25;18(18):5481-7.

Reactive site polymorphism in the murine protease inhibitor gene family is delineated using a modification of the PCR reaction (PCR + 1).

Author information

  • 1Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY 10461.

Abstract

Murine protease inhibitor (alpha 1-PI) proteins are encoded by a multigene family which has undergone recent duplication. It has been suggested that the evolution of diversity within this gene family may be driven by unusual selection for novel function at the reactive site of the duplicated members (1,2,3). In an attempt to use polymerase chain reaction (PCR) to generate and sequence clones spanning the polymorphic reactive site region, a PCR artifact was identified and determined to result from heteroduplex formation during the co-amplification of the related sequences in this multigene system. This artifact results in sequences which are combinatorial mosaics of the template sequences. We present a simple and general method (PCR + 1) for overcoming this artifact and demonstrate its application in delineating five distinct alpha 1-PI reactive site sequences in C57BL/6 mice, thus providing sequence information to generate gene-specific probes. The significance of the reactive site diversity in this protease inhibitor gene family is discussed as well as the general applications and limitations of the PCR + 1 technique.

PMID:
2216721
[PubMed - indexed for MEDLINE]
PMCID:
PMC332227
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk