Figure 1: Fluoresence and phase-contrast microscopic evaluation of murine hematopoietic colonies for GFP expression. Figure 3: GFP expression in peripheral blood leukocytes from a rhesus macaque ...

Mutagenesis of amino acids bound to the fluorophore was key to changing the excitation–emission spectrum of GFP, and it produced GFP variants with different colours and capacities for changing ...