# ContraFold boosts & basics

hmm. 3 more folding engines. I’ve covered one: etrenafold. I heard it’s pretty weird. I know it’s pretty weird. but no one ever talks about contrafold. I think it’s pretty much the same as eternafold, but who knows? let’s try the boosts!

### The hook boost

Now, this is the contrafold hook with the GC as closing pair.

figure 1-1
-0.29 kcal. very interesting. let’s put a C on the hook.

figure 1-2

-0.51. kcal. not as much as eternafold. let’s do a G.

figure 1-3
-0.61 kcal! that’s pretty good.

let’s test with U.

figure 1-4
-0.04 kcal. very bad. we’ll call the hook boost a G.

figure 1-5

### The 1-1 boost

As we all know, in eternafold, we put a U on either side of the 1-1.
but, we must know what the energy is with NO boosts.

figure 2-1
0.68 kcal is no boosts.
let’s try the G-G boost.

figure 2-2
it raised the energy! let’s try the U-U boost.

figure 2-3
it lowered the energy to 0.31 kcal! now, let’s try C-C.

(it made the loop 1.41 kcal)

### The 2-2 loop

We like 2-2 loops. they are so easy to boost. just put a G and another G and two Us. bam! -4.1 kcal. but that's in Vienna. not contrafold. so let's find the contrafold boost for the 2-2. we need to know the energy of the 2-2 with no boosts.

1.44 kcal! now let’s do the GAGA boost, just like the eternafold.

-0.09 kcal! now let’s do all blue.

very high energy. not good. let’s do all red.

(it wasn’t good at all)

### The triloop boost

we all know what a triloop is. it's this loop.

(the one on the right, not the left)

to boost it, put a G on the left of the closing pair, as shown on this figure

# Perfect!

Also, please tell me which boost you liked the most! thanks!

• Hook
• Triloop
• 2-2 loop
• 1-1 loop
• Something else

0 voters

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puzzle used for making post

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More research shows that the hook boost depends on the hook size and shape.