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A gene on chromosome 6p21.3 that encodes a receptor tyrosine kinase belonging to the subfamily homologous to Dictyostelium discoideum protein discoidin (Discoidin Domain-containing Receptor); it is expressed only in epithelial cells (kidney, lung, GI tract, brain) and involved in cell–cell interactions and recognition.

Molecular pathology
DDR1 is overexpressed in various tumours.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


Abbrev. for Diploma in Diagnostic Radiology.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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DDR SDRAM data is sampled relative to both edges of the input clock, doubling the effective data rate/bandwidth of the memory over SDR SDRAM devices.
Even newer Fast Page Mode, EDO, and SDRAM have only increased performance by roughly 15 times.
However, while Whitney's 100MHz memory interface demands PC100 SDRAMS, the Celeron can only access the external world through a 66MHz frontside bus, meaning that Whitney makes calls at 66MHz only to raise them to 100MHz, causing additional dissipation through synchronization.
Semiconductor components and memory modules manufacturer Micron Technology Inc has announced the availability of samples of its new 256MB SDRAM.
Double data- rate SDRAM, a faster version of SDRAM which some argue represents a more evolutionary approach to faster memory architectures than Rambus, has so far won design wins mostly at the high-end rather than the volume market.
Also, in order to optimize data transfer between the CPU and MCP, Toshiba has adapted a "triple- data bus system" which consists of a high speed bus (for SDRAM and NOR), a middle speed bus (for SRAM and NOR) and NAND bus.
With a cover that can be opened without tools, the unit has 128MB PC 133 Error Correction Code SDRAM, a 20GB hard disk drive, an integrated motherboard for improved performance and system access.
Elpida's new DIMMs (Part numbers: EBE21RD4ABHA-xx) are based on Elpida's 512 Megabit DDR2 SDRAM devices that operate up to 533 Megabits per second (Mbps).
It features a 1.6GHz Intel Mobile Pentium 4-M, 128Mb PC2100 DDR SDRAM, a 20Gb hard drive and a 24X CD-ROM drive.
Both models include a 2 Ghz processor and 256 MB SDRAM, expandable to 3GB; all systems are built-to-order.
"Memory would become a bottleneck in the platform if we stuck with SDRAM," the spokesperson commented.
Micron Technology, Inc., (NYSE:MU) has announced that it has sampled the first DDR2 SDRAM SODIMM modules to Intel.