| HoS | horse serum |
|---|---|
| HSF | heat shock factor; hepatocyte stimulatory factor; histamine sensitizing factor; human serum esterase... |
| HSR | Harleco synthetic resin; heated serum reagin; homogeneously staining region |
| HSTF | heat shock transcription factor; human serum thymus factor |
| HuSA | human serum albumin |