| Abstract: | SYNOPSIS. A simple medium, consisting of riboflavin and a mixture of L-glutamic acid, L-tryptophan, L-isoleucine, L-serine, and L-proline has been shown to induce rapid and mass scale excystment in Schizopyrenus russelli. Whereas percentage excystment was found to depend on the concentration of riboflavin and amino acids, more than 80% of cysts were found to excyst within 4 hr, when adequate amounts of these were supplied. Several individual amino acids, particularly L-glutamic acid, L-tryptophan, and L-proline, also supported considerable excystment, but riboflavin was always indispensable. |
