Adenylosuccinate lyase (ADSL) deficiency is a disease of purine metabolism which affects patients both biochemicall and behaviorally. An obstacle of this purine nucleotide cycle(PNC) can be caused brain functional disorder and growth disorder. So ADSL deficiency, which is associated with sever mental retardation, autistic features and energy metabolism. This study was performed to identify SNP on ADSL gene in chicken. The nucleotides were observed as T to C ( 7724th nucleotide), C to T

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