Question

Provide a biochemical/physiological explanation for why lactate dehydrogenases from two different species (question nine, XP_009287036.1 and NP_990615.1) are more similar than two lactate dehydrogenases from the same species (NP_990615.1 and NP_989508.1

Answer 1

Lactate dehydrogenase (LDH) is an excellent indicator for evaluating if there is something wrong somewhere in the body.

It is an important enzyme for almost all cells, so there LDH in almost every cell in the body.

Inside every cell.

Only a little LDH is found in the blood.

However if something goes wrong in the body, like several cells being damaged or a cancer messing up the production, increased levels of LDH can be registered.
The LDH will get from inside the cells and end in the blood, and can therefore be detected.

Unfortunately high levels of LDH can’t be used as a singular diagnostic tool. Even though LDH levels often rise in the case of meningitis, pneumonia and some cancers, it dosen’t prove they are there.
It is more a tool for monitoring the treatment, or verifying which cancer it is, by using several other blood test results.