A Transaction Question

[Gregg Bolinger]

Ok, I haven't recieved very many responses to a couple of other questions, so I thought I would post another one that is similar but still different and may make more sense.
MySQL-MAX - innoDB table types
Connector/J V3
If I begin a transaction with a serilaizable isolation level and then move my result set to a new record, will my AutoIncremented ID be protected from other writes to the same table as long as I have not commited the transaction?
Also, which isolation level will protect only a single record from being writable, or is that even possible? Do isolation levels affect the entire table?