* Pfizer will cut 35 pct of R&D square footage
* Drugmaker will cut unspecified number of jobs
NEW YORK, Nov 9 (Reuters) - Pfizer Inc (PFE.N), the world's biggest drugmaker, will close six research and development sites and trim jobs in the United States and the United Kingdom, following the acquisition of Wyeth.
The company on Monday said it will reduce its global research and development square footage by 35 percent.
Pfizer will discontinue R&D operations in Princeton, New Jersey; Chazy, Rouses Point and Plattsburgh, New York; Sanford and Research Triangle Park, North Carolina; and Gosport, Slough/Taplow, United Kingdom.
"While these changes are expected to bolster productivity and reduce costs, they will result in staff reductions," Pfizer said in a statement.
Pfizer will now conduct R&D at five main sites and nine specialized units around the world, as compared with 20 sites upon closing the acquisition of Wyeth.
The company did not elaborate on the number of jobs that will be cut. A spokeswoman could not be immediately reached for comment.
Pfizer, already the world's largest drugmaker, got much bigger last month with completion of a $67.3 billion acquisition of Wyeth. (Reporting by Juan Lagorio; editing by Carol Bishopric)