sort by best latest
In short and specific term 'Bile' is the correct answer.
You can help the HubPages community highlight top quality content by ranking this answer up or down.
I'm not sure, but it was a Melanin, are not it? I hope that I was helpful.
Copyright © 2017 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
Copyright © 2017 HubPages Inc. and respective owners.