Amino acids are organic compounds that serve as the building blocks of proteins. They do not come from proteins per se; rather, proteins are composed of long chains of amino acids linked together. When we consume proteins in our diet, our bodies break them down during digestion into their constituent amino acids. These amino acids are then absorbed by the body and can be reused to synthesize new proteins that are necessary for various functions, such as cell structure, transport, enzyme creation, and more. Therefore, while amino acids are derived from the dietary proteins we consume by the process of digestion, they are the foundational elements that constitute proteins, not a product of them.

To uninstall Yarn globally, the method depends on how you initially installed it. If you used npm, run `npm uninstall -g yarn` in your terminal. For those who installed Yarn through a package manager for their OS (like apt for Ubuntu or homebrew for macOS), use the respective uninstall command (`sudo apt-get remove yarn` for Debian/Ubuntu or `brew uninstall yarn` for macOS). Always ensure your system's package list is updated beforehand. It’s also wise to check if any dependencies or projects rely on the global Yarn instance to avoid unexpected issues.

Pad printing on High-Density Polyethylene (HDPE) requires inks that adhere well to its non-porous surface. Solvent-based inks are commonly used because they slightly dissolve the HDPE surface, ensuring better adhesion. However, the specific formulation can vary by manufacturer, and it might necessitate pre-treatment processes like flame, plasma, or corona treatment to enhance ink adhesion. Epoxy or polyamide-based inks are often recommended for their durability and chemical resistance on HDPE. It's crucial to consult with ink suppliers about the specific application to choose the most suitable ink that meets the desired durability and compliance requirements, especially for items that come into contact with food or are exposed to challenging environmental conditions.