Molecular and biochemical mechanisms of human iris color: A comprehensive review 6/2/20 MicroRNAs also affect melanocyte synthesis, which is usually affected by the downregulation of essential genes involved in pigmentation. Researchers from Iran linked light-activated microRNA biogenesis in plants to the expression genes that effect the number, size and/or the pH of pathways that influence melanin synthesis in the context of human iris color and human skin pigmentation via the L‐tyrosine amino acid precursor. The energy-dependent microRNA-mediated link from the…