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Antifreeze Proteins: Proteins that bind to ice and modify the growth of ice crystals. They perform a cryoprotective role in a variety of organisms.Retinol-Binding Proteins, Cellular: A subclass of retinol-binding proteins that take part in the intracellular storage and transport of RETINOL. They are both functionally and structurally distinct from PLASMA RETINOL-BINDING PROTEINS.Antifreeze Proteins, Type I: A subclass of ANTIFREEZE PROTEINS that are 3-5 kDa in size and contain a single alanine-rich amphipathic alpha-helix.Antifreeze Proteins, Type III: A subclass of ANTIFREEZE PROTEINS that are globular, 6.5 kDa in size and contain compact beta-sheet structures.Ice: The solid substance formed by the FREEZING of water.Retinol-Binding Proteins: Proteins which bind with RETINOL. The retinol-binding protein found in plasma has an alpha-1 mobility on electrophoresis and a molecular weight of about 21 kDa. The retinol-protein complex (MW=80-90 kDa) circulates in plasma in the form of a protein-protein complex with prealbumin. The retinol-binding protein found in tissue has a molecular weight of 14 kDa and carries retinol as a non-covalently-bound ligand.Flounder: Common name for two families of FLATFISHES belonging to the order Pleuronectiformes: left-eye flounders (Bothidae) and right-eye flounders (Pleuronectidae). The latter is more commonly used in research.Freezing: Liquids transforming into solids by the removal of heat.Bone Morphogenetic Protein Receptors, Type I: A subtype of bone morphogenetic protein receptors with high affinity for BONE MORPHOGENETIC PROTEINS. They can interact with and undergo PHOSPHORYLATION by BONE MORPHOGENETIC PROTEIN RECEPTORS, TYPE II. They signal primarily through RECEPTOR-REGULATED SMAD PROTEINS.Antifreeze Proteins, Type IV: A subclass of ANTIFREEZE PROTEINS that contain four amphipathic alpha-helices folded into an antiparallel helix bundle.Antifreeze Proteins, Type II: A subclass of ANTIFREEZE PROTEINS that have a cystine-rich globular structure of approximately 14 kD.Myositis Ossificans: A disease characterized by bony deposits or the ossification of muscle tissue.Tenebrio: A genus of beetles which infests grain products. Its larva is called mealworm.Vitamin A: Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of CAROTENOIDS found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.Fishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Osmeriformes: An order of fish including smelts, galaxiids, and salamanderfish.Fish Proteins: Proteins obtained from species of fish (FISHES).Marinomonas: A genus of gram-negative, aerobic bacteria in the family OCEANOSPIRILLACEAE. Members of this genus have the ability to synthesize MELANIN pigments.Antarctic Regions: The continent lying around the South Pole and the southern waters of the Atlantic, Pacific, and Indian Oceans. It includes the Falkland Islands Dependencies. (From Webster's New Geographical Dictionary, 1988, p55)Eels: Common name for an order (Anguilliformes) of voracious, elongate, snakelike teleost fishes.Glycoproteins: Conjugated protein-carbohydrate compounds including mucins, mucoid, and amyloid glycoproteins.Bone Morphogenetic Protein Receptors, Type II: A subtype of bone morphogenetic protein receptors with low affinity for BONE MORPHOGENETIC PROTEINS. They are constitutively active PROTEIN-SERINE-THREONINE KINASES that can interact with and phosphorylate TYPE I BONE MORPHOGENETIC PROTEIN RECEPTORS.Flatfishes: Common name for the order Pleuronectiformes. A very distinctive group in that during development they become asymmetrical, i.e., one eye migrates to lie adjacent to the other. They swim on the eyeless side. FLOUNDER, sole, and turbot, along with several others, are included in this order.Salmoniformes: An order of fish comprising salmons, trouts, whitefish, graylings, and other families. They are both marine and freshwater fish, found in all oceans and are quite numerous in the Northern Hemisphere. (From Nelson: Fishes of the World)Secale cereale: A hardy grain crop, rye, grown in northern climates. It is the most frequent host to ergot (CLAVICEPS), the toxic fungus. Its hybrid with TRITICUM is TRITICALE, another grain.Beetles: INSECTS of the order Coleoptera, containing over 350,000 species in 150 families. They possess hard bodies and their mouthparts are adapted for chewing.Amino Acid Sequence: The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Cold Climate: A climate characterized by COLD TEMPERATURE for a majority of the time during the year.Lysosomal-Associated Membrane Protein 2: An abundant lysosomal-associated membrane protein that has been found to shuttle between LYSOSOMES; ENDOSOMES; and the PLASMA MEMBRANE. Loss of expression of lysosomal-associated membrane protein 2 is associated with GLYCOGEN STORAGE DISEASE TYPE IIB.Daucus carota: A plant species of the family APIACEAE that is widely cultivated for the edible yellow-orange root. The plant has finely divided leaves and flat clusters of small white flowers.Snow: Frozen water crystals that fall from the ATMOSPHERE.Models, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Crystallization: The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Smad1 Protein: A receptor-regulated smad protein that undergoes PHOSPHORYLATION by BONE MORPHOGENETIC PROTEIN RECEPTORS. It regulates BONE MORPHOGENETIC PROTEIN signaling and plays an essential role in EMBRYONIC DEVELOPMENT.Protein Conformation: The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).Protein Structure, Secondary: The level of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to alpha helices, beta strands (which align to form beta sheets) or other types of coils. This is the first folding level of protein conformation.Cold Temperature: An absence of warmth or heat or a temperature notably below an accustomed norm.Perciformes: The most diversified of all fish orders and the largest vertebrate order. It includes many of the commonly known fish such as porgies, croakers, sunfishes, dolphin fish, mackerels, TUNA, etc.Neutron Diffraction: The scattering of NEUTRONS by matter, especially crystals, with accompanying variation in intensity due to interference effects. It is useful in CRYSTALLOGRAPHY and POWDER DIFFRACTION.Smad6 Protein: An inhibitory Smad protein that negatively regulates the SIGNAL TRANSDUCTION PATHWAYS from BONE MORPHOGENETIC PROTEIN RECEPTORS. Smad6 inhibits PHOSPHORYLATION of SMAD2 PROTEIN and SMAD3 PROTEIN.Gadiformes: An order of fish including the families Gadidae (cods), Macrouridae (grenadiers), and hakes. The large Gadidae family includes cod, haddock, whiting, and pollock.Base Sequence: The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.Siphonaptera: An order of parasitic, blood-sucking, wingless INSECTS with the common name of fleas.Acclimatization: Adaptation to a new environment or to a change in the old.Circular Dichroism: A change from planar to elliptic polarization when an initially plane-polarized light wave traverses an optically active medium. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Smad5 Protein: A receptor-regulated smad protein that undergoes PHOSPHORYLATION by BONE MORPHOGENETIC PROTEIN RECEPTORS. It regulates BONE MORPHOGENETIC PROTEIN signaling and is essential for PHYSIOLOGICAL ANGIOGENESIS.Insect Proteins: Proteins found in any species of insect.Solutions: The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)