hypomorphic allele - molecular evidence
An InDel introducing a frameshift and an early stop codon in the first coding exon of the Shmt-RA transcript - the Shmt-RB and Shmt-RC transcripts should be unaffected.
Deletion of two bases in the first coding exon of Shmt leads to a frameshift and early translation termination.
decreased sleep
Srrko homozygotes show decreased sleep during night-time and day-time.