QRICH2 and Reduced sperm motility: The N-terminal purified protein of QRICH2 and 2 mM Gln could partially rescue the reduced tubulin glutamylation levels and mitochondrial function caused by Qrich2 KO and Gln absence, which suggested the QRICH2 N-terminal purified protein and Gln as the potential cure method for treating the asthenospermia patients with the reduced tubulin glutamylation levels.