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A glycoprotein rapidly labelled with [14C]glucose present in a murine melanoma cell line.

If a murine melanoma cell line PG19 is metabolically labelled with [14C]glucose for a short time, one particular membrane component incorporates more radioactivity than the rest. This is a glycoprotein of about Mr 100,000, which is not preferentially labelled in non-malignant variants of the melanoma or in suppressed hybrid cells formed between PG19 and mouse fibroblasts.