Production and utilization of hydrogen peroxide associated with melanogenesis and tyrosinasemediated oxidations of DOPA and dopamine Mastore 2005 The FEBS Journal Wiley Online Library Peptides stimulate growth hormone and IGF 1 production, promoting angiogenesis and cellular proliferation. In patients with undetected cancers, these peptides can accelerate tumor growth. Conventional imaging misses early cancers. Circulating tumor Figure 1 from Engineering of L tyrosine oxidation in Escherichia coli and microbial production of hydroxytyrosol. Semantic Scholar Colorimetric and visual detection of tyrosine based on its copper catalyzed enzymatic oxidation to dopamine and subsequent reductive formation of colored gold nanoparticles using copper ions Microchimica Acta Springer Nature Link