Problem 7, 135

Problem 7, 135 - (Explain) c) The conductance of a lipid...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem 7 (Due Apr. 19) a) Explain the differences in the melting points of stearic (octadecanoic) acid (mp 69.6°C), trans -oleic (9-octadecenoic) acid (mp 44.5°C) and cis -oleic acid (mp 13.4°C). b) The membrane lipids from 4.74 × 10 9 erythrocytes form a monolayer of area 0.89 m 2 when spread on the surface of water. It has also been determined from ultrastructural studies that the surface area of a single erythrocyte is approximately 100 μm 2 . What do these data indicate about the structural motif characterizing the lipid components in the membrane?
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (Explain) c) The conductance of a lipid bilayer membrane containing valinomycin in a medium containing potassium ions decreased abruptly when the temperature was lowered from 40C to 36C. In contrast, the change in conductance of the same membrane containing gramacidin was negligible when exposed to the same temperature drop in the same medium. Provide a brief explanation for these observations....
View Full Document

Ask a homework question - tutors are online