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Related Experiment Videos

Mouse gamma-casein cDNA: PCR cloning and sequence analysis

T Sasaki1, M Sasaki, J Enami

  • 1Research Laboratory, Zenyaku Kogyo Co., Ltd., Tokyo, Japan.

Zoological Science
|February 1, 1993
PubMed
Summary
This summary is machine-generated.

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Researchers sequenced mouse gamma-casein, determining its N- and C-terminal amino acid sequences. They also amplified and cloned the gamma-casein complementary DNA (cDNA), revealing high nucleotide and amino acid identity with rat gamma-casein.

Area of Science:

  • Proteomics
  • Molecular Biology
  • Genomics

Background:

  • Gamma-casein is a major milk protein, crucial for infant nutrition and dairy product functionality.
  • Understanding gamma-casein's structure and genetic basis is important for dairy science and biotechnology.

Purpose of the Study:

  • To determine the partial amino acid sequence of mouse gamma-casein.
  • To clone and sequence the complementary DNA (cDNA) encoding mouse gamma-casein.
  • To compare mouse gamma-casein cDNA with its rat counterpart.

Main Methods:

  • Gas-phase amino acid sequencing for N- and C-terminal analysis.
  • Affinity chromatography for peptide isolation.
  • Polymerase chain reaction (PCR) amplification and Rapid Amplification of cDNA Ends (RACE) for cDNA cloning.

Related Experiment Videos

  • Nucleotide and amino acid sequence comparison.

    • Main Results:

    • The N-terminal (23 residues) and C-terminal (13 residues) amino acid sequences of mouse gamma-casein were determined.
    • A full-length cDNA (920 base pairs) encoding mouse gamma-casein, including non-coding regions, was successfully cloned.
    • Mouse and rat gamma-casein cDNAs exhibited 80% nucleotide identity, with 75% amino acid identity in the coding regions.

    Conclusions:

    • The study provides the first detailed sequence information for mouse gamma-casein.
    • The cloned cDNA enables further functional and comparative studies of gamma-casein.
    • Significant sequence homology suggests conserved function between mouse and rat gamma-casein.