You have to answer a biomedical question in binary format, i.e. only yes and no are the only acceptable answer formats. A list of paragraphs is provided as context to help you answer the question.

Question: Are microtubules marked by glutamylation?

Context: Together with detyrosination, glutamylation and other modifications, tubulin acetylation may form a unique 'language' to regulate microtubule structure and function.
Glutamylation, the most prevalent tubulin posttranslational modification, marks stable microtubules and regulates recruitment and activity of microtubule- interacting proteins.
Enzymes of the tubulin tyrosine ligase-like (TTLL) family posttranslationally modify and thereby mark microtubules by glutamylation, generating specific recognition sites for microtubule-interacting proteins.
PTMs of the cytoskeleton, including phosphorylation, glycosylation, ubiquitination, detyrosination/tyrosination, (poly)glutamylation and (poly)glycylation, acetylation, sumoylation, and palmitoylation, will be addressed in this chapter.
The tubulin posttranslational modifications: acetylation, detyrosination, polyglutamylation, and polyglycylation play important roles in microtubule functions
In most eukaryotic cells, tubulin is subjected to posttranslational glutamylation, a conserved modification of unclear function.
yes