The property involved in this transaction is located at 619 W 54th St, New York, NY, 10019. It has a total square footage of 42,000 square feet and is situated in the New York market. The lease agreement was signed by the New York Stem Cell Foundation for a duration of 21 years.

Summary of transaction details:

• Property Type: Lease
• Transaction Amount: Not specified
• Address: 619 W 54th St, New York, NY, 10019
• Square Feet: 42,000
• Tenant: New York Stem Cell Foundation
• Landlord: Taconic Investment Partners
• Tenant's Representative: Gary Kamenetsky - CBRE
• Landlord's Representatives: Kristen Morgan - JLL, Ellen Israel - JRT Realty Group, Gregory Smith

This transaction involved multiple parties, with Gary Kamenetsky from CBRE representing the tenant, New York Stem Cell Foundation. The landlord, Taconic Investment Partners, was represented by Kristen Morgan from JLL, Ellen Israel from JRT Realty Group, and Gregory Smith.