How many combinations for protein that is 50 amino acids long

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

while the heads of the phospholipid structure attract water, the tails are hydrophobic. the model shows how the hydrophilic section folds around the fluid molecules to bring them into the cell so they don’t need to pass through the hydrophobic tails.