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Decode the Coding Interview in C#: Real-World Examples

Feature #4: Identifying Proteins

Explore how to determine whether a genome sequence represents a new protein by checking for palindromic sequences using recursion. Understand the process of comparing characters recursively from both ends of the string, and the implications of time and space complexity in analyzing genome data.

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Description

We have an unknown sequence of genomes that is thought to be a new protein. To accept or reject this sequence as a new protein, one method we can use is to identify it as a palindromic sequence. A palindrome is a string that reads the same from the start as the end.

We’ll be provided with a sequence of genomes in the form of a string. Our task is to identify whether these genomes constitute a palindrome to be considered as a potential protein.

Solution

A recursive approach can be used to solve this problem. We can keep comparing the first and last elements of the string. If these values are equal, then the updated string, with the matched entries removed, can be sent to the recursive function.

Let’s see how we might implement this functionality:

  1. Define the following base case:

    • If the given sequence has a length equal to zero or one, it will return true,
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