I know I can search for accidental "straight" single and double quotes by searching for ^34 and ^39.
But what is the code for the single quote that looks like this `, created by the leftmost top key on on the most common keyboard layouts (e.g. US 101 and US International). The key with ` and ~. Is there a code to search for that character?

(And, incidentally, does it have a corresponding character that slants the other way?)

MTIA.