Core introduction
This first presentation introduces all the Ensembl APIs, which use object-oriented programming (OOP) in Perl, and how to access the API documentation and schema.

Exercise 1
- Find documentation for the exon class in the Ensembl core code base. Which method would you use to retrieve the DNA sequence for an exon? What is the return type for this method?
- Can you find a table which stores stable IDs for transcripts? Which table stores DNA sequences? How many columns does this table have?