NEW YORK CITY — Cignature Realty Associates has brokered the sale of a three-building multifamily portfolio located in the Hell’s Kitchen section of Manhattan. A private interest fund acquired the portfolio from Yaron LLC for $15.5 million. Totaling 34 apartment units, the portfolio includes 439, 441 and 443 W. 48th St. The adjacent buildings, which total 24,515 square feet, were constructed in 1901. Michael Rahimzada of Cignature Realty represented the seller. Cignature Realty Associates also represented the buyer in the deal.