The invention relates to a method for producing eicosapentanoic acid, docosapentanoic acid and/or docohexanoic acid in transgenic plants. According to said method, the plant is provided with at least one nucleic acid sequence coding for a polypetide with a Δ6 desaturase activity, at least one nucleic acid sequence coding for a polypeptide with a Δ6 elongase activity, at least one nucleic acid sequence coding for a polypeptide with a Δ5 desaturase activity, and at least one nucleic acid sequence coding for a polypeptide with a Δ5 elongase activity, the nucleic acid sequence coding for a polypeptide with a Δ5 elongase activity being modified in relation to the nucleic acid sequence in the organism from which the sequence originates, such that it is adapted to the codon use in at least one type of plant. For the production of docosahexanoic acid, at least one nucleic acid sequence coding for a polypeptide with a Δ4 desaturase activity is also introduced into the plant.

The present invention relates to a production method of (R)-reticuline including: a step for obtaining a recombinant host cell by inserting, into a host cell, a gene 1 which is composed of a nucleotide sequence having at least 70% homology to a nucleotide sequence of SEQ ID NO: 2 and which is DNA encoding a protein having an enzymatic activity of CYP80Y2, and a gene 2 which is composed of a nucleotide sequence having at least 70% homology to a nucleotide sequence of SEQ ID NO: 3 and which is DNA encoding a protein having an enzymatic activity of oxidoreductase; a step for expressing, in the recombinant host cell, the protein having the enzymatic activity of CYP80Y2 and the protein having the enzymatic activity of oxidoreductase; and a step for producing (R)-reticuline from (S)-reticuline by using the recombinant host cell.

Described herein are transgenic plants with increased oil content that exhibit enhanced expression of plastid-specific lipases (e.g., PLIP1). The manufacture of lipids can be enhanced by expression of FAD4.

The present disclosure discloses preparation of M. alpina CCFM698 thalli and application thereof in a feed additive, and belongs to the field of biological engineering and feed additives. The total fatty acid content of the M. alpina dried thalli obtained by the present disclosure is 30%-40% by weight of the dried thalli, and the EPA content is 24% or more by weight of total fatty acids. The dosage of the dried thalli in the feed in the disclosure is 0.5-1.5% of the total weight of the basal feed. The thallus feed additive is reasonable in fatty acid composition and very high in EPA content and can be used for producing high-DHA eggs which are beneficial to body health of eaters. The DHA content in each of eggs laid by laying hens fed with the feed containing the feed additive of the present disclosure reaches about 120 mg which is obviously higher than that in the prior art.

The present disclosure is based on the identification of a novel sequence motif present in halogenase type enzymes. From this, the disclosure provides methods for identifying and or detecting halogenases (halogenating enzymes) and novel halogenases identifiable using such methods. The disclosure also provides a novel cohort of enzymes and novel methods for achieving substrate halogenation.

The present invention provides transgenic Brassica events LBFLFK and LBFDAU and progeny thereof, and cells, seeds, plants comprising DNA diagnostic for these events. The invention also provides artificial oligonucleotide primers and probes that are diagnostic for the LBFLFK and LBFDAU events and their progeny in a sample, and methods for detecting the presence of the LBFLFK and LBFDAU events and their progeny in a sample. The invention further provides oil and commodity products derived from the LBFLFK and LBFDAU events.

Provided are a viral vector for treating autoimmune disease and diabetes and a construction method and an application thereof. The viral vector is a lentiviral expression plasmid or an adeno-associated viral expression plasmid cloned with mfat-1 gene, and the mfat-1 gene is as shown in SEQ ID NO: 1.

Materials and methods for creating canola (e.g., Brassica napus) lines having oil with increased oleic acid content are provided herein.

The present invention relates to methods for the conversion of the substrate specificity of desaturases. Specifically, the present invention pertains to a method for the conversion of the substrate specificity of a Δ5 and/or Δ6 desaturase to the substrate specificity of a Δ4 desaturase, the method comprising: identifying regions and/or amino acid residues which control the substrate specificity of (i) the Δ5 and/or Δ6 desaturase and (ii) the Δ4 desaturase; and replacing in the amino acid sequence of the mentioned Δ5 and/or Δ6 desaturase, the regions and/or amino acid residues which control the substrate specificity of the Δ5 and/or Δ6 desaturase, by the corresponding regions and/or amino acid residues which control the substrate specificity of the Δ4 desaturase, thereby converting the substrate specificity of the Δ5 and/or Δ6 desaturase to the substrate specificity of the Δ4 desaturase. The present invention further concerns a method for the conversion of the substrate specificity of a Δ4 desaturase to the substrate specificity of a Δ5 and/or Δ6 desaturase, the method comprising: identifying regions and/or amino acid residues which control the substrate specificity of (i) the Δ4 desaturase and (ii) the Δ5 and/or Δ6 desaturase; and replacing in the amino acid sequence of the indicated Δ4 desaturase, the regions and/or amino acid residues which control the substrate specificity of the Δ4 desaturase, by the corresponding regions and/or amino acid residues which control the substrate specificity of the Δ5 and/or Δ6 desaturase, thereby converting the substrate specificity of the Δ4 desaturase to the substrate specificity of the Δ5 and/or Δ6 desaturase. In addition, the invention encompasses desaturases with converted substrate specificity.

The present invention provides transgenic Brassica events LBFLFK and LBFDAU and progeny thereof, and cells, seeds, plants comprising DNA diagnostic for these events. The invention also provides artificial oligonucleotide primers and probes that are diagnostic for the LBFLFK and LBFDAU events and their progeny in a sample, and methods for detecting the presence of the LBFLFK and LBFDAU events and their progeny in a sample. The invention further provides oil and commodity products derived from the LBFLFK and LBFDAU events.