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what is duochrome pigment
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The concept of "first three amino acids" can be interpreted in different contexts. For proteins encoded by genes in DNA, the first amino acid is almost always methionine in eukaryotes, due to the AUG start codon, which signals the beginning of translation. However, methionine is sometimes removed after translation, and different sequences can be found at the N-terminus of proteins. In discussions about essential amino acids for human nutrition, there isn't a specific "first three amino acids," since the emphasis is on all essential amino acids that must be obtained through diet, which includes histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. If considering the chemical structure, amino acids don’t have a sequential order like alphabets; their importance or order is more about their role or requirement in biological processes rather than a linear sequence.
Fish emulsion, primarily used as an organic fertilizer, is not formulated for canine consumption and can be harmful if ingested by dogs. Its high concentration of nutrients, although beneficial for plants, can upset a dog's digestive system or lead to more severe health issues such as sodium ion poisoning due to its potentially high salt content. Additionally, the strong odor of fish emulsion might attract dogs, but its ingestion can result in gastrointestinal discomfort, vomiting, or diarrhea. If a dog ingests a large amount, it's crucial to consult a veterinarian immediately. While fish emulsions are excellent for garden health, they should be kept away from pets to avoid accidental ingestion.
Plumbing pipes are predominantly made from copper, PEX (cross-linked polyethylene), PVC (polyvinyl chloride), and for some applications, stainless steel or galvanized steel. Copper has been a long-standing choice for its durability and reliability in resisting corrosion, making it suitable for both hot and cold water supply lines. PEX, a flexible plastic tubing, is valued for its ease of installation and resistance to breakage due to freezing. PVC pipes are commonly used for drain, waste, and vent (DWV) lines due to their lightweight, ease of installation, and resistance to corrosion and chemicals. Stainless steel and galvanized steel pipes are less common but used in specific situations where corrosion resistance or strength is needed. Each material's selection depends on the application, local codes, and cost considerations.
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