#amylopectin

[mission-to-dietitian]

Amylose vs. Amylopectin

Enzymes can only start at the end of the molecule. This is why it is easier to break 1,6 bonds in amylopectin than 1,4 bonds in a looooong amylose molecule. Thus, amylopectin has a higher glycemic index (can raise blood sugar faster) than amylose.

Amylopectin is branched (1,6 bond is broken down by salivary amylase much more easily).

Amylose is just the long glucose chain.

Amylose has a lower glycemic index (raises blood glucose more slowly) than amylopectin (amylopectin can get cut off faster and get absorbed quicker than amylose). The one that’s broken down faster has a higher glycemic index (amylopectin).

[uravichii]

hi

love you

[tenth-sentence]

At branch points, new chains of 24 to 30 units start by α-1,6-glycosidic bonds (figure 22.11).

"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.

[sciencesolutions]

[mission-to-dietitian]

[mission-to-dietitian]

Starch is composed of long linear chains of molecules called amylose plus highly branched chains called amylopectin. The amylose chains can easily absorb water and swell for gelatinization. Amylopectin contributes to the plant cells’ rigid structure and to thickening when it is cooked.

[tv-taughtmehowtofeel]

Name a more iconic duo. I’ll wait.

[thescantscholar]

Choosing the right potato for your recipe is largely based on density - the ratio of moisture to starch. And, surprise of surprises, I learned more about amylopectin! Potatos have two starches - amylose and amylopectin. Amylose is structured in long chains that break down as they cook. Amylopectin has a branched structure that holds firm. So, russetts are denser - more starch to moisture ratio - but have more amylose, so they break down during cooking and absorb more moisture over time. The opposite for red bliss potatoes. And my favorites - Yukon golds - are right in the middle!