Proteins differ in the amount of hydrophobic amino acids that are present on their surface. This difference can be exploited in salt fractionation but can also be used in a higher resolution method using hydrophobic interaction chromatography (HIC).

TLS Online TPP Program

#Id: 8112

#Unit 1. Molecules and their Interaction Relevant to Biology

The amino group at C-2 bears a fatty acid in amide linkage.

The fatty acid is usually saturated or monounsaturated, with 16, 18, 22, or 24 carbon atoms.

Ceramide is the parent compound for this group.

TLS Online TPP Program

#Id: 2784

#Unit 13. Methods in Biology

Retention factor (k) is simply the additional time that the analyte takes to elute from the column relative to an unretained or excluded analyte that does not interact with the stationary phase and which, by definition, has a k value of 0. Thus

TLS Online TPP Program

#Id: 7101

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 8981

#Unit 11. Evolution and Behavior

Population genetics, applies the principles of transmission genetics to large groups of individuals. 

TLS Online TPP Program

#Id: 9316

#Unit 4. Cell Communication and Cell Signaling

Light absorption by rhodopsin→activation of a cGMP PDE → hydrolyzes cGMP to 5′-GMP→ cGMP levels  drop →channel close →membrane hyperpolarization→reduction in NT release→transmitted to brain