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A multiloop circuit is shown in the figure,but some quantities are not labeled.Find the current I1 if the batteries are ideal.(It is not necessary to solve the entire circuit. )
Pepsin
An enzyme produced in the stomach that initiates digestion of protein.
Polypeptides
Chains of amino acids linked by peptide bonds, serving as the building blocks for proteins.
Proteins
Proteins are large, complex molecules essential for the structure, function, and regulation of the body's cells, tissues, and organs.
Secretions
Substances produced and released by cells or glands in an organism, often serving important functions like lubrication or digestion.
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