Randomized Sequences

Randomized sequences are DNA, RNA, or protein sequences generated with deliberately varied nucleotide or amino acid arrangements to sample biological sequence space. Researchers create them computationally or through synthesis by selecting sequence length, composition, and, when needed, constraints that preserve or exclude specific motifs. These sequences can serve as negative controls, experimental standards, or libraries for testing how sequence features influence binding, expression, folding, or function. In biology, randomized sequence designs support hypothesis testing, assay validation, and the identification of functional patterns that emerge when candidate sequences are compared with controlled random counterparts.

Randomized Sequences - Related Videos

Research

JoVE Journal - Biology
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Primer-Free Aptamer Selection Using A Random DNA Library

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Cited by 20 •

2010

SELEX protocols comprise multiple rounds of selection, each of which require regeneration of bound ligands, which in turn require fixed primer sequences flanking the random library regions. These fixed primer sequences can interfere with the selection process (false positives and negatives). Here we present a primer-free protocol.

Research

JoVE Journal - Biochemistry

Amplicon Sequencing using the Long-Read Sequencing Technologies

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2025

This protocol was optimized for targeted deep sequencing of 18 drug-resistance regions in Mycobacterium tuberculosis using a long-read sequencing platform, followed by analysis with a tuberculosis-specific bioinformatics pipeline designed for long-read data.

Education

JoVE Core - Statistics

Random Variables

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2023

A random variable is a single numerical value that indicates the outcome of a procedure. The concept of random variables is fundamental to the probability theory and was introduced by a Russian mathematician, Pafnuty Chebyshev, in the mid-nineteenth century. Uppercase letters such as X or Y denote a random variable. Lowercase letters like x or y denote the value of a random variable. If X is a random variable, then X is written in words, and x is given as a number. For example, let X = the...

Randomized Experiments

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2023

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias. Simple randomization Simple...

Random Error

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2024

Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...

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