Streptococcipossessfastidiousnut ﹒ Initiallybloodorserumisessential Streptococci ﹒ Thesourceofnitrogeninmanufacture,peptoneandcasein ﹒ The sourceofcarbonincludesglucose。Wasconsideredtobeimportanttocell ﹒ And forseveralkindsofaminoacidscould ’ tbesynthesiz ......