  We discuss the relation between unintegrated and integrated vertex operators
in string worldsheet theory, in the context of BV formalism. In particular, we
clarify the origin of the Fradkin-Tseytlin term. We first consider the case of
bosonic string, and then concentrate on the case of pure spinor superstring in
$AdS_5\times S^5$. In particular, we compute the action of $b_0 - \bar{b}_0$ on
the beta-deformation vertex. As a by-product, we formulate some new conjectures
on general finite-dimensional vertices.
