Avoid using the conditional could or would and invoking the future tese needlessly,
because these uses add an unnecessary sense of indefiniteness to a definite statement.
Conditional version:
The changing about of one amino acid in the chain could make an entirely different protein.
Non-conditional:
The changing about of one amino acid in the chain make an entirely different protein.
Conditional:
Crystals would form fusion if the temperature or pressure was high.
Non-conditional:
Crystals form from fusion at a high termperature or high pressure.