[Regeneration of Nocardia orientalis protoplasts].

A method for effective regeneration of the protoplasts of N. orientalis, a vancomycin-producing organism into viable cells on a rich organic medium was developed. The dependence of the regeneration on the conditions of the protoplast plating out and the level of the regeneration medium dehydration was studied. The highest positive effect was observed when the protoplasts were suspended in the agarized medium and then plated out on the regeneration medium dehydrated by 2.5 per cent. The frequency of the protoplast regeneration increased on addition of bovine serum albumin to the regeneration medium. The effect of bovine serum albumin depended on its concentration. When the albumin concentration was optimal (0.01 per cent) the regeneration amounted to 100 per cent.