STS

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STS

(Synchronous Transport Signal) The electrical equivalent of the SONET optical signal. In SDH, the European counterpart of SONET, STS is known as STM (Synchronous Transport Module). The signal begins in electrical format and is converted to optical for transmission over the SONET fiber facilities. An STS-1 frame is transmitted in 125ms, yielding raw bandwidth of 51.84 Mbps. The STS frame includes five elements: Synchronous Payload Envelope, Section Overhead, Line Overhead, Path Overhead, and Payload.

The STS-1 frame is the basic building block for SONET, much like the DS1 frame in a T-carrier environment. See OC and SONET.
References in periodicals archive ?
As per recent findings, steroid sulfatase (STS) has emerged as a novel therapy target.
Keywords: Oestrogen, Estrone (E1), Estrone sulfate (E1S), Estradiol (E2), Oestrogen receptor (ER), Aromatase (AROM), Aromatase inhibitors (AIs), Steroid sulfatase (STS), 667 COUMATE (STX64), Dual-aromatase-sulfatase inhibitors (DASI).
The company however noted that the treatment was well tolerated and has shown an inhibition of the steroid sulfatase associated with a significant reduction in the levels of some circulating steroid hormones and with in some patients, prolonged clinical partial responses, demonstrating the clinical interest of sulfatase inhibition.
Steroid sulfatase is normally present in epithelial cells, fibroblasts, and leukocytes.
Steroid sulfatase is believed to block the action of cholesterol sulfate and allow the bonds to become free of each other.

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