Describe the path of electrons in photosystem I. Provide a diagram if necessary. 
Definitions:
Purine
A type of nitrogenous base found in DNA and RNA, which includes adenine and guanine.
Pyrimidine
A category of nitrogenous bases that includes cytosine, thymine, and uracil, which are fundamental components of nucleic acids.
X-ray Crystallography
A scientific method used to determine the atomic and molecular structure of a crystal by diffracting X-rays through the crystal.
Franklin
Refers to Benjamin Franklin, a prominent American polymath known for his contributions to the founding of the United States and his discoveries and theories regarding electricity.
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