Characteristics：SpCas9 is derived from Streptococcus pyogenes, a type of bacteria that uses the CRISPR-Cas9 system as part of its immune defense mechanism against viral infections. SpCas9 is widely used in genome editing due to its ability to target and cut specific DNA sequences with high precision.
MeCP2 is a neuron-specific promoter derived from the mouse Methyl-CpG-binding Protein 2 gene, with a length of approximately 230 base pairs (bps).
