asphaltum, a component of traditional black 'japanning' is known to fluoresce

the only way you can visualize the vaces because they're too tiny to be visualized by standard microscopy labeling with florescent dyes is about the only way we can um easily identify what molecules have been passed down from the vesicles to The Germ cells but that's very restrictive you see because there will be millions of different molecules in a single visle to be faced with only being able to label three or four of those otherwise we can't make out the the differences is it's very tedious

Fluorescence Activated Cell Sorting (FACS).  From sorting cells for single cell genomics to identifying the host range of a plasmid; from detecting metabolically active cells in an environmental sample to studying colitogenic-driving intestinal bacteria, FACS can be used in a multitude of applications to study microbial communities (Rinke et al. 2014, Klumper et al. 2015, Kalyuzhnaya et al. 2008, Hatzenpichler et al. 2016, Palm et al. 2014).

photobleaching

fluorescein isothiocyanate (Sigma-Aldrich, CAS: 3326-32-7) dissolved in PBS

calibrants for red fluorescence, such as TexasRed, are currently being investigated.