Proteins secreted to the extracellular environment or to the periphery of the cell envelope. the secretome. play essential roles in foraging. antagonistic and mutualistic interactions. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC550-WUH721816ALE6L0-0F38460-16TB-7-2K-RPM-SATA-6Gb-s-512e-ISE-3-5in-Hard-Drive/