I recently answered an Avvo question about whether one can sell a partnership interest. The question and answer are paraphrased below (with emphasis added).
Q. In California, is a general partnership terminated upon the sale of one partner’s interest to a third party? How would the remaining partner and new partner continue business? Would a new entity need to be formed? There is no written partnership agreement.
A. Corporations Code Section 16201 states that “A partnership is an entity distinct from its partners.” Therefore, a membership change does not, by itself, create a new partnership.