Table 4. Expression patterns of zebrafish receptor PTPs.
| PTP type: | gene: | 8 cell | 6 hpf | 10 hpf | 24 hpf | 48 hpf | 72 hpf |
| R1/R6 | ptprc | +/− | +/− | s | s | s | s |
| R4 | ptpra | ++ | + | + | s | s | s |
| ptprea | ++ | ++ | s | s | s | s | |
| ptpreb | + | ++ | s | s | s | s | |
| R2B | ptprm | ++ | ++ | ss | ss | ss | |
| ptprk | ++ | + | s | ss | ss | ss | |
| ptprt | + | +/− | +/− | s | ss | ss | |
| ptprua | ++ | +/− | + | + | ss | ss | |
| ptprub | − | +/− | − | + | ss | ss | |
| R2A | ptprfa | + | ++ | s | ss | ss | s |
| ptprfb | + | ++ | s | s | s | s | |
| ptprsa | + | + | +/− | s | s | ss | |
| ptprsb | + | + | +/− | s | ss | ++ | |
| ptprda | +/− | + | − | s | s | s | |
| ptprdb | − | +/− | − | ss | ss | ss | |
| R5 | ptprga | +/− | + | − | ss | s | ++ |
| ptprgb | + | + | s | s | s | s | |
| ptprza | + | + | − | s | ss | ss | |
| ptprzb | +/− | + | − | s | ss | ss | |
| R3 | ptprb | +/− | + | − | +/− | ss | s |
| ptprja | +/− | +/− | − | s | ss | s | |
| ptprjb | + | + | − | ss | s | s | |
| ptprh | + | + | + | ss | s | s | |
| ptpro | ++ | ++ | s | s | s | s | |
| ptprq | + | + | + | s | + | ++ | |
| R7 | ptprr | ++ | ++ | ++ | s | s | s |
| R8 | ptprna | + | + | s | ss | ss | ss |
| ptprnb | + | + | − | s | s | s | |
| ptprn2 | +/− | +/− | s | ss | ss | ss |
Expression patterns of all classical receptor PTPs at 6 distinct stages of zebrafish development as shown in Fig. 6, 7, 8, 9, 10 and 11 were analyzed and quantified as “−” for no expression, “+/−” for faint expression, “+” for expression and “++” for strong expression, “s” for localized expression or “ss” for strong localized expression.