Luciferin glows in the dark and is found in fireflies, deep sea fish, etc. that use bioluminescence. This model comes with bonds that glow in the dark; only $9.95.
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Indigo Instruments has held inventory of genuine Cochranes of Oxford (Orbit) parts for 30+ years (See Skeletal (Orbit/Minit)) that are compatible with every molecular model we have sold since day 1. This level of quality may appear expensive but no parts support from other vendors costs even more.