2. Given an arbitrary DNA sequence stored in a string called sequence, complete Python code in the cell below that converts any uppercase characters in the string to lowercase. You can assume that the only uppercase letters in the string will be A, T, C, and G.

# here is an example of a DNA string stored in a variable called sequence

sequence = "AGCTGGGCT"

new_sequence = ""

# your code here

print(new_sequence)