Formation of 8-S-L-Cysteinyladenosine from 8-Bromoadenosine and Cysteine.

When 8-bromoadenosine was incubated with cysteine at pH 7.2 and 37°C, an exclusive product was generated. This product was identified as a cysteine substitution derivative of adenosine at the 8 position, 8-S-L-cysteinyladenosine.