Yoğurttan ekzopolisakkarit üreten streptococcus thermophilus suşunun izolasyonu ve tanımlanması

Production of exopolysaccharides (EPS) by starter Lactic acid bacteria (LAB) gained special interest due to technological role of thesenatural polymers. Yogurt samples were collected from diferent households in Turkey and bacterial strains were isolated and evaluatedfor EPS production. Strains potentially producing EPS were then identified to species level with 16S rRNA sequencing. An EPS producerStreptecoccus thermophilus strain was identified from yogurt samples. EPS was extracted from culture supernatants of S. thermophilus andpartially purified and structural analysis of the crude EPS by FTIR spectroscopy revealed the presence of typical functional groups relatedto exopolysaccharides. This study explains the identification of a potential starter culture for yogurt production with EPS production.