Class Notes (834,337)
Canada (508,493)
BIOL 1000 (60)
Lecture 6

BIOL 1000 Lecture 6: Lecture 6
Premium

3 Pages
34 Views
Unlock Document

Department
Biological Sciences
Course
BIOL 1000
Professor
Kevin G.Scott
Semester
Fall

Description
o|82 = Chemical catalysts that speed up chemical reactions in cells Structural proteins = found in hair and fibres that make up tendons and ligaments  Contractile proteins = found packed inside muscle cells Defensive proteins – e.g. immune system antibodies Signal proteins – e.g. hormones and other chemical messengers  Receptor proteins = built into cell membranes, transmit signals into cells  Transport proteins – e.g. hemoglobin delivers O to working mu2cles & tissues Storage proteins – e.g. ovalbumin (found in egg white) source of amino acids for developing embryos   Function of protein depends on specific shape Lysosome – enzyme found in sweat/tears/saliva, one long polypeptide folded into a globular shape Most enzymes and other proteins are globular in shape Structural proteins are typically long and thin, called fibrous proteins Proteins must bind to other molecules to function Denaturation = polypeptide chains unravel, losing their specific shape and function Can be due to changes in salt concentration and pH, excessive heat A protein’s shape depends on four levels of structure Primary structure = a protein’s unique sequence of amino acids Determined by inherited genetic information  Protein cannot perform designated function if it is not in its primary structure Secondary structure = parts of a polypeptide coil/fold into a local pattern Results in a structure called ‘alpha helix’, or ‘beta-pleated sheet’ Both patterns maintained by hydrogen bon
More Less

Related notes for BIOL 1000

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit