The Cell: A Molecular Approach

Fourth Edition

Book Link:

• Current Chapter: 2
  • Animations
  • Quiz
  • Problems
  • Micrographs
  • Videos
  • Weblinks
• Chapter 1
• Chapter 2
• Chapter 3
• Chapter 4
• Chapter 5
• Chapter 6
• Chapter 7
• Chapter 8
• Chapter 9
• Chapter 10
• Chapter 11
• Chapter 12
• Chapter 13
• Chapter 14
• Chapter 15
• Chapter 16
• Chapter 17
• Chapter 18

Chapter 2: The Composition of Cells

Video 2.5  Hemoglobin

Video Download Link

Hemoglobin is a complex protein that binds oxygen in red blood cells. It consists of four folded polypeptide subunits (two α and two β) that assemble themselves into a quaternary structure. Within each subunit is a heme group, the oxygen carrying site. (2 MB)