Fig. 5: Reverse phase C−18 HPLC chromatogram of spongin acid hydrolysis.
From: Discovery of mammalian collagens I and III within ancient poriferan biopolymer spongin
The chromatogram peaks labeled with blue letters correspond to known halogenated derivatives of tyrosine. Those with red letters correspond to brominated dityrosines, never previously reported in sponges. The structure of the main brominated dityrosines found in the sponge is shown on the left. A detailed ESI-MS and UV-Vis analysis of each highlighted compound is given in Supplementary Information, Supplementary Figs. 12−18. Source data are provided as a Source Data file.
