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Table 2 Endogenous fluorophores.

From: Non invasive in vivo investigation of hepatobiliary structure and function in STII medaka (Oryzias latipes): methodology and applications

  Ex (nm) Em (nm)
Flavoproteins: flavin adenine dinucleotide (FAD), flavin mononucleotide (FMN) 450 550
Pyridine Nucleotides: nicotinamide dinucleotide (NAD), nicotinamide dinucleotide phosphate (NADP), the reduced states fluoresce – NADPH, NADH 336 450
Tryptophan 295 329
Hydroxykynurenine glucoside (3-HGK) 520 550
Serotonin (5-HT) 290/366 340-440/510
5 HIAA 300 350
α-napthol 340 460
Bilirubin 435 500
Protoporphyrin 424/408 594/630
Collagen I 340/500 410/520
Elastin 330 405
Lipofuscin 300 420
Vitamin A 345 490
Vitamin E 295 335
Thiamin (B1) 366 430
Riboflavin (B2) 440 514
Salicylic Acid 319 408
  1. Given are some of the known endogenous fluorophores and their excitation (Ex) and emission (Em) wavelength(s).