Search Problem 2 Find a picture of the secondary and tertiary structure of human hemoglobin. These 3-D files can be viewed directly from this web site or by using a locally installed viewer such as RasMol , Protein Explorer or Chime .
Many databases contain DNA and protein sequences.
These databases can usually be searched by keyword or sequence. Here is a page where Escherichia coli is found to be more closely related to Haemophilus influenzae by sequence comparison. Here is a link to lots of phylogenetic software. Given the following distance matrix build a phylogenetic tree. Building a phylogenetic tree from distance data can be done via the CBRG TreeGen web tool.