A subclass of receptor-like protein tryosine phosphatases that contain heavily glycosylated and cysteine-rich extracellular regions that include fibronectin type III-like domains.

Synonyms: Receptor Like Protein Tyrosine Phosphatases, Class 1 Receptor-Like Protein Tyrosine Phosphatases, Class 1,6 Receptor-Like Protein Tyrosine Phosphatases, Class I Receptor-Like Protein Tyrosine Phosphatases, Class 6 Receptor Like Protein Tyrosine Phosphatases, Class 6 Receptor Like Protein Tyrosine Phosphatases, Class I EC 3.1.3.48 Receptor-Like Protein Tyrosine Phosphatases, Class 1