Oops!

Two records don't (didn't) agree with the spec.

Eg, PS00539 has F-[GSTV]-P-R-L-[G>].

This is a valid record
The documentation was incomplete

Need to validate before making assumptions.
   -Done in Biopython with a regular expression.

Can also cross-compare SWISS-PROT to PROSITE.

 
.