Anandan.10_lecture_ppt

Anandan.10_lecture_ppt - Bio 122 Dr. Shivanthi Anandan...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Bio 122 Dr. Shivanthi Anandan Outline 10.1 ECM and cell walls 10.2 Cell Junctions 10.3 Tissues Anandan BIO 122 Fall 2010 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Multicellular Single organism composed of more than one cell Main benefit from the division of labor Larger genomes = larger proteomes Additional proteins for Cell communication Arrangement and attachment of cells Cell specialization Anandan BIO 122 Fall 2010
Background image of page 2
3 Extracellular matrix (ECM) Network of material secreted from the cells forming a complex meshwork outside of cells Major component of certain parts of plants and animals Bone and cartilage of animals Woody parts of plants Anandan BIO 122 Fall 2010
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Animal cells secrete ECM that helps to support and organize cells Major macromolecules of are proteins and polysaccharides Proteins form large fibers Polysaccharides give a gel-like character Important roles such as strength, structural support, organization, and cell signaling Anandan BIO 122 Fall 2010
Background image of page 4
5 Collagen fibers Proteoglycan Anandan BIO 122 Fall 2010
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Proteins of ECM Adhesive Fibronectin and laminin Adhere ECM components together and to the cell surface Structural Collagen provides tensile strength Main protein found in bone, cartilage, tendon, skin Elastin provides elasticity Expands and returns to original shape Anandan BIO 122 Fall 2010
Background image of page 6
7 Anandan BIO 122 Fall 2010
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Anandan BIO 122 Fall 2010
Background image of page 8
Collagens are a family of proteins that give animal cells a variety of ECM properties At least 27 different types of collagens in humans Many different genes encode procollagen Collagens all have a common triple helix structure Similar yet distinct amino acid sequence affects structure and function of collagen fibers Differential gene regulation controls which types of collagens are made Wrinkling a symptom of decreasing collagen synthesis with age 9 Anandan BIO 122 Fall 2010
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Anandan BIO 122 Fall 2010
Background image of page 10
Polysaccharides in animal ECM After proteins, 2 nd major component In vertebrates, the most abundant are glycosaminoglycans (GAGs) Long, unbranched polysaccharides with a
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 49

Anandan.10_lecture_ppt - Bio 122 Dr. Shivanthi Anandan...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online