👉 Spiroid is a term used in the field of biochemistry, specifically in the study of cell membrane proteins. Spiroids are small molecules that play a crucial role in the cellular processes such as signaling pathways and transport mechanisms. They can be classified into two main categories: polypeptide spiroids and nucleic acid spiroids (nucleoside spiroids). Polypeptide spiroids are composed of amino acids, while nucleoside spiroids contain nucleotides (adenine, thym