Abstract: The present invention relates to a DNA fragment for improving translation efficiency, and a recombinant vector containing the same, and more specifically, to a DNA fragment which comprises any one nucleotide sequence selected from the group consisting of SEQ ID NOs: 1-6, SEQ ID NOs: 8-10, SEQ ID NOs: 13 and 14 and SEQ ID NO: 16, and improves the translation efficiency of a heterologous protein placed in the downstream, and a recombinant vector containing the DNA fragment. The DNA fragment for improving translation efficiency according to the present invention and a recombinant vector containing the same can improve the translation of a heterologous protein in a transgenic plant.

Abstract: The present invention relates to a method for producing transgenic plants, which involves producing hemagglutinin proteins of the H5N1 virus using a plant transformation recombinant vector, wherein said vector can express hemagglutinin proteins of the H5N1 virus, the highly pathogenic avian influenza virus, and transport proteins expressed in plants to the endoplasmic reticulum and enable the retention of the proteins in the endoplasmic reticulum to enable glycosylation required for antigen activity. The present invention also relates to a method for the mass production of hemagglutinin proteins of the antigenic H5N1 virus from transgenic plants or a vaccine composition for the avian influenza virus comprising the transgenic plants or the hemagglutinin proteins produced from the plants. The transgenic plants can be used as edible vaccines, antigenic hemagglutinin proteins produced can be used as protein vaccines for the H5N1 avian influenza virus, or as diagnostic reagents for avian influenza virus infection.