The Texas Research and Technology Foundation has amassed more land on the near East Side as the nonprofit seeks to build a hub there for life sciences startups and established companies. TRTF bought the former site of the G.J. Sutton building on Center Street in mid-April for $9.5 million from the state, which razed the structure in 2019. The nearly six-acre property is a block away from the 120,000-square-foot Merchant’s Ice industrial complex on East Houston Street, which TRTF and its nonprofit subsidiary VelocityTX have been converting into lab and office space for bioscience tenants since buying it in 2017…