This video explains us about the basics of what porphyrias are and how they act as ligand together with the biosynthesis of porphyrin and introduction to chlorophyll and heme group synthesis.Porphyria (por-FEAR-e-uh) refers to a group of disorders that result from a buildup of natural chemicals that produce porphyrin in your body. Porphyrins are essential for the function of hemoglobin. Watch the video for more information. TIMELINE: 0:00 Introduction 0:10 Structure 0:38 Porphrias as ligand 1”04 Biosynthesis of porphyrin 1:28 Examples of porphyrin 1:50 Chlorophyll 3:05 Heme group 4:40 End