Frameshift deletion of bases 4:938740 through 4:938774 resulting in the addition of SICQSIPKQFRHIRI after threonine 103 of all mGluR isoforms and premature truncation after these novel amino acids.
Deletion of bases 4:938740..938774 in mGluR results in a frameshift and early translation termination after the additon of 15 novel amino acids (SICQSIPKQFRHIRI).