Internal control: This is a control sequence that is amplified in the same reaction as the target sequence and detected with a different probe (i.e., duplex PCR is carried out). An internal control is often used to rule out failure of amplification in cases where the target sequence is not detected.
How it works. A symporter is an integral membrane protein that is involved in the transport of many differing types of molecules across the cell membrane. The symporter works in the plasma membrane and molecules are transported across the cell membrane at the same time, and is, therefore, a type of cotransporter. The transporter is called a symporter, because the molecules will travel in the same direction in relation to each other. This is in contrast to the antiport transporter. Typically, the ion will move
In evolutionary biology and biogeography, sympatric and sympatry are terms referring to organisms whose ranges overlap or are even identical, so that they occur together at least in some places. If these organisms are closely related (e.g. sister species), such a distribution may be the result of sympatric speciation.Etymologically, sympatry is derived from the Greek roots ÏÏÎ½ (together, with) and ÏÎ±ÏÏÎ¯Ï (homeland or fatherland).he polyploidal offspring occupy the same environment as the parent plants (hence sympatry), but are reproductively isolated. A rare example of sympatric speciation in animals is the divergence of resident and transient Orca forms in the northeast Pacific.