* https://www.sciencedirect.com/science/article/abs/pii/0305049189900904 https://www.sciencedirect.com/science/article/abs/pii/030504... * https://www.ncbi.nlm

* https://www.sciencedirect.com/science/article/abs/pii/0305049189900904 https://www.sciencedirect.com/science/article/abs/pii/030504... * https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5444072/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5444072/ * https://www.jstage.jst.go.jp/article/fishsci1994/61/6/61_6_964/_pdf https://www.jstage.jst.go.jp/article/fishsci1994/61/6/61_6_9... -- see figure 2 on page 4, showing extracted carotenoproteins